18839420952 has 64 divisors (see below), whose sum is σ = 52633445760. Its totient is φ = 5569670400.

The previous prime is 18839420903. The next prime is 18839420953. The reversal of 18839420952 is 25902493881.

It is a junction number, because it is equal to n+sod(n) for n = 18839420895 and 18839420904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18839420953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859438 + ... + 881085.

It is an arithmetic number, because the mean of its divisors is an integer number (822397590).

Almost surely, 2^18839420952 is an apocalyptic number.

18839420952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18839420952 is an abundant number, since it is smaller than the sum of its proper divisors (33794024808).

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

18839420952 is a wasteful number, since it uses less digits than its factorization.

18839420952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740584 (or 1740580 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 18839420952 in words is "eighteen billion, eight hundred thirty-nine million, four hundred twenty thousand, nine hundred fifty-two".