18657855437044 has 24 divisors (see below), whose sum is σ = 33208873477920. Its totient is φ = 9169646019744.

The previous prime is 18657855436967. The next prime is 18657855437101. The reversal of 18657855437044 is 44073455875681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3154119 + ... + 6874894.

It is an arithmetic number, because the mean of its divisors is an integer number (1383703061580).

Almost surely, 2^{18657855437044} is an apocalyptic number.

It is an amenable number.

18657855437044 is a deficient number, since it is larger than the sum of its proper divisors (14551018040876).

18657855437044 is a wasteful number, since it uses less digits than its factorization.

18657855437044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10036959 (or 10036957 counting only the distinct ones).

The product of its (nonzero) digits is 451584000, while the sum is 67.

The spelling of 18657855437044 in words is "eighteen trillion, six hundred fifty-seven billion, eight hundred fifty-five million, four hundred thirty-seven thousand, forty-four".