18739114938 has 40 divisors (see below), whose sum is σ = 42169795668. Its totient is φ = 6219550656.

The previous prime is 18739114897. The next prime is 18739114939. The reversal of 18739114938 is 83941193781.

It is a happy number.

18739114938 is a `hidden beast` number, since 1 + 87 + 391 + 149 + 38 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18731480769 + 7634169 = 136863^2 + 2763^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18739114939) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 210481 + ... + 285972.

Almost surely, 2^18739114938 is an apocalyptic number.

18739114938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18739114938 is an abundant number, since it is smaller than the sum of its proper divisors (23430680730).

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

18739114938 is a wasteful number, since it uses less digits than its factorization.

18739114938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496700 (or 496691 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The spelling of 18739114938 in words is "eighteen billion, seven hundred thirty-nine million, one hundred fourteen thousand, nine hundred thirty-eight".