18263136 has 48 divisors (see below), whose sum is σ = 48432384. Its totient is φ = 6025344.

The previous prime is 18263101. The next prime is 18263137. The reversal of 18263136 is 63136281.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18263137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8965 + ... + 10811.

It is an arithmetic number, because the mean of its divisors is an integer number (1009008).

Almost surely, 2^18263136 is an apocalyptic number.

18263136 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 18263136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24216192).

18263136 is an abundant number, since it is smaller than the sum of its proper divisors (30169248).

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

18263136 is a wasteful number, since it uses less digits than its factorization.

18263136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963 (or 1955 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 18263136 is about 4273.5390486106. The cubic root of 18263136 is about 263.3450246728.

The spelling of 18263136 in words is "eighteen million, two hundred sixty-three thousand, one hundred thirty-six".