18958023972 has 96 divisors (see below), whose sum is σ = 49452533760. Its totient is φ = 6280636320.

The previous prime is 18958023967. The next prime is 18958023979. The reversal of 18958023972 is 27932085981.

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 (18958023979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19285393 + ... + 19286375.

It is an arithmetic number, because the mean of its divisors is an integer number (515130560).

Almost surely, 2^18958023972 is an apocalyptic number.

18958023972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18958023972 is an abundant number, since it is smaller than the sum of its proper divisors (30494509788).

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

18958023972 is a wasteful number, since it uses less digits than its factorization.

18958023972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 18958023972 in words is "eighteen billion, nine hundred fifty-eight million, twenty-three thousand, nine hundred seventy-two".