19437972040 has 64 divisors (see below), whose sum is σ = 48745411200. Its totient is φ = 6932671488.

The previous prime is 19437972007. The next prime is 19437972061. The reversal of 19437972040 is 4027973491.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739324 + ... + 765163.

It is an arithmetic number, because the mean of its divisors is an integer number (761647050).

Almost surely, 2^19437972040 is an apocalyptic number.

19437972040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19437972040 is an abundant number, since it is smaller than the sum of its proper divisors (29307439160).

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

19437972040 is a wasteful number, since it uses less digits than its factorization.

19437972040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504534 (or 1504530 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 19437972040 in words is "nineteen billion, four hundred thirty-seven million, nine hundred seventy-two thousand, forty".