18269634240 has 1344 divisors, whose sum is σ = 80521039872. Its totient is φ = 3881779200.

The previous prime is 18269634199. The next prime is 18269634283. The reversal of 18269634240 is 4243696281.

18269634240 is a `hidden beast` number, since 1 + 8 + 2 + 6 + 9 + 634 + 2 + 4 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 344710054 + ... + 344710106.

It is an arithmetic number, because the mean of its divisors is an integer number (59911488).

Almost surely, 2^18269634240 is an apocalyptic number.

18269634240 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 18269634240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40260519936).

18269634240 is an abundant number, since it is smaller than the sum of its proper divisors (62251405632).

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

18269634240 is a wasteful number, since it uses less digits than its factorization.

18269634240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 18269634240 in words is "eighteen billion, two hundred sixty-nine million, six hundred thirty-four thousand, two hundred forty".