18657855437045 has 32 divisors (see below), whose sum is σ = 24993630604800. Its totient is φ = 13253368242240.

The previous prime is 18657855436967. The next prime is 18657855437101. The reversal of 18657855437045 is 54073455875681.

It is a happy number.

It is not a de Polignac number, because 18657855437045 - 2²² = 18657851242741 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89053502 + ... + 89262768.

It is an arithmetic number, because the mean of its divisors is an integer number (781050956400).

Almost surely, 2^{18657855437045} is an apocalyptic number.

It is an amenable number.

18657855437045 is a deficient number, since it is larger than the sum of its proper divisors (6335775167755).

18657855437045 is a wasteful number, since it uses less digits than its factorization.

18657855437045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247025.

The product of its (nonzero) digits is 564480000, while the sum is 68.

The spelling of 18657855437045 in words is "eighteen trillion, six hundred fifty-seven billion, eight hundred fifty-five million, four hundred thirty-seven thousand, forty-five".