18257919408 has 60 divisors (see below), whose sum is σ = 51137282560. Its totient is φ = 6081153408.

The previous prime is 18257919367. The next prime is 18257919431. The reversal of 18257919408 is 80491975281.

It is a happy number.

18257919408 is a `hidden beast` number, since 18 + 2 + 579 + 19 + 40 + 8 = 666.

It is a super-4 number, since 4×18257919408⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134610 + ... + 233742.

Almost surely, 2^18257919408 is an apocalyptic number.

18257919408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18257919408 is an abundant number, since it is smaller than the sum of its proper divisors (32879363152).

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

18257919408 is a wasteful number, since it uses less digits than its factorization.

18257919408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100426 (or 100417 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 18257919408 in words is "eighteen billion, two hundred fifty-seven million, nine hundred nineteen thousand, four hundred eight".