18972904380 has 24 divisors (see below), whose sum is σ = 53124132432. Its totient is φ = 5059441152.

The previous prime is 18972904373. The next prime is 18972904381. The reversal of 18972904380 is 8340927981.

It is a super-2 number, since 2×18972904380² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18972904381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158107477 + ... + 158107596.

It is an arithmetic number, because the mean of its divisors is an integer number (2213505518).

Almost surely, 2^18972904380 is an apocalyptic number.

18972904380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18972904380 is an abundant number, since it is smaller than the sum of its proper divisors (34151228052).

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

18972904380 is a wasteful number, since it uses less digits than its factorization.

18972904380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316215085 (or 316215083 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 18972904380 in words is "eighteen billion, nine hundred seventy-two million, nine hundred four thousand, three hundred eighty".