18951234698879 has 16 divisors (see below), whose sum is σ = 22176345347328. Its totient is φ = 15859862992512.

The previous prime is 18951234698839. The next prime is 18951234698899. The reversal of 18951234698879 is 97889643215981.

It is not a de Polignac number, because 18951234698879 - 2⁸ = 18951234698623 is a prime.

It is a super-2 number, since 2×18951234698879² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18951234698839) 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, 178742357 + ... + 178848350.

It is an arithmetic number, because the mean of its divisors is an integer number (1386021584208).

Almost surely, 2^{18951234698879} is an apocalyptic number.

18951234698879 is a deficient number, since it is larger than the sum of its proper divisors (3225110648449).

18951234698879 is a wasteful number, since it uses less digits than its factorization.

18951234698879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357590894.

The product of its digits is 1881169920, while the sum is 80.

The spelling of 18951234698879 in words is "eighteen trillion, nine hundred fifty-one billion, two hundred thirty-four million, six hundred ninety-eight thousand, eight hundred seventy-nine".