18772107636 has 24 divisors (see below), whose sum is σ = 43910826624. Its totient is φ = 6241763200.

The previous prime is 18772107631. The next prime is 18772107661. The reversal of 18772107636 is 63670127781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18772107631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1945740 + ... + 1955363.

It is an arithmetic number, because the mean of its divisors is an integer number (1829617776).

Almost surely, 2^18772107636 is an apocalyptic number.

It is an amenable number.

18772107636 is an abundant number, since it is smaller than the sum of its proper divisors (25138718988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18772107636 is a wasteful number, since it uses less digits than its factorization.

18772107636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901511 (or 3901509 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

The spelling of 18772107636 in words is "eighteen billion, seven hundred seventy-two million, one hundred seven thousand, six hundred thirty-six".