18269618040 has 320 divisors, whose sum is σ = 63700227360. Its totient is φ = 4692971520.

The previous prime is 18269618009. The next prime is 18269618051. The reversal of 18269618040 is 4081696281.

18269618040 is a `hidden beast` number, since 1 + 8 + 26 + 9 + 618 + 0 + 4 + 0 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 11024892 + ... + 11026548.

Almost surely, 2^18269618040 is an apocalyptic number.

18269618040 is a gapful number since it is divisible by the number (10) 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 18269618040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31850113680).

18269618040 is an abundant number, since it is smaller than the sum of its proper divisors (45430609320).

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

18269618040 is a wasteful number, since it uses less digits than its factorization.

18269618040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804 (or 1791 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18269618040 in words is "eighteen billion, two hundred sixty-nine million, six hundred eighteen thousand, forty".