18537372940 has 24 divisors (see below), whose sum is σ = 38938333392. Its totient is φ = 7413072960.

The previous prime is 18537372937. The next prime is 18537372943. The reversal of 18537372940 is 4927373581.

It is an interprime number because it is at equal distance from previous prime (18537372937) and next prime (18537372943).

It is not an unprimeable number, because it can be changed into a prime (18537372943) 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, 34834 + ... + 195673.

It is an arithmetic number, because the mean of its divisors is an integer number (1622430558).

Almost surely, 2^18537372940 is an apocalyptic number.

18537372940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18537372940 is an abundant number, since it is smaller than the sum of its proper divisors (20400960452).

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

18537372940 is a wasteful number, since it uses less digits than its factorization.

18537372940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234537 (or 234535 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 18537372940 in words is "eighteen billion, five hundred thirty-seven million, three hundred seventy-two thousand, nine hundred forty".