18269136 has 60 divisors (see below), whose sum is σ = 51421188. Its totient is φ = 6054912.

The previous prime is 18269131. The next prime is 18269161. The reversal of 18269136 is 63196281.

It can be written as a sum of positive squares in 2 ways, for example, as 10112400 + 8156736 = 3180^2 + 2856^2 .

It is a super-2 number, since 2×18269136² = 667522660372992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 18269136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18269131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41976 + ... + 42408.

Almost surely, 2^18269136 is an apocalyptic number.

18269136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18269136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25710594).

18269136 is an abundant number, since it is smaller than the sum of its proper divisors (33152052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18269136 is a wasteful number, since it uses less digits than its factorization.

18269136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 731 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 18269136 is about 4274.2409852511. The cubic root of 18269136 is about 263.3738604862.

The spelling of 18269136 in words is "eighteen million, two hundred sixty-nine thousand, one hundred thirty-six".