18738926969 has 12 divisors (see below), whose sum is σ = 21803096448. Its totient is φ = 16058435400.

The previous prime is 18738926951. The next prime is 18738926971. The reversal of 18738926969 is 96962983781.

It is a de Polignac number, because none of the positive numbers 2^k-18738926969 is a prime.

It is a super-2 number, since 2×18738926969² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18738926899 and 18738926908.

It is not an unprimeable number, because it can be changed into a prime (18738926939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199424 + ... + 277934.

It is an arithmetic number, because the mean of its divisors is an integer number (1816924704).

Almost surely, 2^18738926969 is an apocalyptic number.

It is an amenable number.

18738926969 is a deficient number, since it is larger than the sum of its proper divisors (3064169479).

18738926969 is an equidigital number, since it uses as much as digits as its factorization.

18738926969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83396 (or 83389 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 68.

The spelling of 18738926969 in words is "eighteen billion, seven hundred thirty-eight million, nine hundred twenty-six thousand, nine hundred sixty-nine".