18923739421392 has 60 divisors (see below), whose sum is σ = 57034047984004. Its totient is φ = 5822689052160.

The previous prime is 18923739421333. The next prime is 18923739421451. The reversal of 18923739421392 is 29312493732981.

18923739421392 is a `hidden beast` number, since 1 + 8 + 9 + 23 + 7 + 394 + 213 + 9 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (18923739421333) and next prime (18923739421451).

It can be written as a sum of positive squares in 2 ways, for example, as 12088944871056 + 6834794550336 = 3476916^2 + 2614344^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5054415709 + ... + 5054419452.

Almost surely, 2^{18923739421392} is an apocalyptic number.

18923739421392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18923739421392 is an abundant number, since it is smaller than the sum of its proper divisors (38110308562612).

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

18923739421392 is a wasteful number, since it uses less digits than its factorization.

18923739421392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10108835188 (or 10108835179 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The spelling of 18923739421392 in words is "eighteen trillion, nine hundred twenty-three billion, seven hundred thirty-nine million, four hundred twenty-one thousand, three hundred ninety-two".