18319668936 has 16 divisors (see below), whose sum is σ = 45799172400. Its totient is φ = 6106556304.

The previous prime is 18319668923. The next prime is 18319668973. The reversal of 18319668936 is 63986691381.

It is a super-2 number, since 2×18319668936² (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 18319668936.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381659746 + ... + 381659793.

It is an arithmetic number, because the mean of its divisors is an integer number (2862448275).

Almost surely, 2^18319668936 is an apocalyptic number.

It is an amenable number.

18319668936 is an abundant number, since it is smaller than the sum of its proper divisors (27479503464).

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

18319668936 is a wasteful number, since it uses less digits than its factorization.

18319668936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763319548 (or 763319544 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 60.

The spelling of 18319668936 in words is "eighteen billion, three hundred nineteen million, six hundred sixty-eight thousand, nine hundred thirty-six".