18887202813 has 48 divisors (see below), whose sum is σ = 27004803840. Its totient is φ = 11735572992.

The previous prime is 18887202809. The next prime is 18887202869. The reversal of 18887202813 is 31820278881.

It is not a de Polignac number, because 18887202813 - 2² = 18887202809 is a prime.

It is a super-2 number, since 2×18887202813² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18887202883) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23345953 + ... + 23346761.

It is an arithmetic number, because the mean of its divisors is an integer number (562600080).

Almost surely, 2^18887202813 is an apocalyptic number.

It is an amenable number.

18887202813 is a deficient number, since it is larger than the sum of its proper divisors (8117601027).

18887202813 is a wasteful number, since it uses less digits than its factorization.

18887202813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 48.

The spelling of 18887202813 in words is "eighteen billion, eight hundred eighty-seven million, two hundred two thousand, eight hundred thirteen".