19637740960 has 24 divisors (see below), whose sum is σ = 46394163396. Its totient is φ = 7855096320.

The previous prime is 19637740957. The next prime is 19637740973. The reversal of 19637740960 is 6904773691.

It can be written as a sum of positive squares in 2 ways, for example, as 17380730896 + 2257010064 = 131836^2 + 47508^2 .

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19637740898 and 19637740907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61367781 + ... + 61368100.

Almost surely, 2^19637740960 is an apocalyptic number.

19637740960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19637740960 is an abundant number, since it is smaller than the sum of its proper divisors (26756422436).

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

19637740960 is a wasteful number, since it uses less digits than its factorization.

19637740960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122735896 (or 122735888 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 52.

The spelling of 19637740960 in words is "nineteen billion, six hundred thirty-seven million, seven hundred forty thousand, nine hundred sixty".