18767937213 has 6 divisors (see below), whose sum is σ = 27109242654. Its totient is φ = 12511958136.

The previous prime is 18767937203. The next prime is 18767937259. The reversal of 18767937213 is 31273976781.

It can be written as a sum of positive squares in only one way, i.e., 14223424644 + 4544512569 = 119262^2 + 67413^2 .

It is not a de Polignac number, because 18767937213 - 2¹⁰ = 18767936189 is a prime.

It is a super-2 number, since 2×18767937213² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18767937213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18767937203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1042663170 + ... + 1042663187.

It is an arithmetic number, because the mean of its divisors is an integer number (4518207109).

Almost surely, 2^18767937213 is an apocalyptic number.

It is an amenable number.

18767937213 is a deficient number, since it is larger than the sum of its proper divisors (8341305441).

18767937213 is a wasteful number, since it uses less digits than its factorization.

18767937213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085326363 (or 2085326360 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The spelling of 18767937213 in words is "eighteen billion, seven hundred sixty-seven million, nine hundred thirty-seven thousand, two hundred thirteen".