18808147686867 has 32 divisors (see below), whose sum is σ = 31427489702400. Its totient is φ = 9719842129920.

The previous prime is 18808147686847. The next prime is 18808147686871. The reversal of 18808147686867 is 76868674180881.

It is not a de Polignac number, because 18808147686867 - 2²⁰ = 18808146638291 is a prime.

It is a super-2 number, since 2×18808147686867² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18808147686792 and 18808147686801.

It is not an unprimeable number, because it can be changed into a prime (18808147686847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 210889492 + ... + 210978657.

It is an arithmetic number, because the mean of its divisors is an integer number (982109053200).

Almost surely, 2^{18808147686867} is an apocalyptic number.

18808147686867 is a deficient number, since it is larger than the sum of its proper divisors (12619342015533).

18808147686867 is a wasteful number, since it uses less digits than its factorization.

18808147686867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421868363.

The product of its (nonzero) digits is 1387266048, while the sum is 78.

The spelling of 18808147686867 in words is "eighteen trillion, eight hundred eight billion, one hundred forty-seven million, six hundred eighty-six thousand, eight hundred sixty-seven".