18622879911 has 32 divisors (see below), whose sum is σ = 28005112320. Its totient is φ = 12229564032.

The previous prime is 18622879907. The next prime is 18622879931. The reversal of 18622879911 is 11997822681.

It is a happy number.

18622879911 is a `hidden beast` number, since 1 + 8 + 622 + 8 + 7 + 9 + 9 + 1 + 1 = 666.

It is not a de Polignac number, because 18622879911 - 2² = 18622879907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18622879931) 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, 478590 + ... + 516036.

It is an arithmetic number, because the mean of its divisors is an integer number (875159760).

Almost surely, 2^18622879911 is an apocalyptic number.

18622879911 is a deficient number, since it is larger than the sum of its proper divisors (9382232409).

18622879911 is a wasteful number, since it uses less digits than its factorization.

18622879911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37732 (or 37726 counting only the distinct ones).

The product of its digits is 870912, while the sum is 54.

The spelling of 18622879911 in words is "eighteen billion, six hundred twenty-two million, eight hundred seventy-nine thousand, nine hundred eleven".