18689696938357 has 16 divisors (see below), whose sum is σ = 19724761768320. Its totient is φ = 17673239308032.

The previous prime is 18689696938277. The next prime is 18689696938369. The reversal of 18689696938357 is 75383969698681.

It is a cyclic number.

It is not a de Polignac number, because 18689696938357 - 2³⁹ = 18139941124469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18689696930357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11353633 + ... + 12895129.

It is an arithmetic number, because the mean of its divisors is an integer number (1232797610520).

Almost surely, 2^{18689696938357} is an apocalyptic number.

It is an amenable number.

18689696938357 is a deficient number, since it is larger than the sum of its proper divisors (1035064829963).

18689696938357 is a wasteful number, since it uses less digits than its factorization.

18689696938357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547532.

The product of its digits is 25395793920, while the sum is 88.

The spelling of 18689696938357 in words is "eighteen trillion, six hundred eighty-nine billion, six hundred ninety-six million, nine hundred thirty-eight thousand, three hundred fifty-seven".