19942975140 has 96 divisors (see below), whose sum is σ = 62212921344. Its totient is φ = 4731788160.

The previous prime is 19942975139. The next prime is 19942975223. The reversal of 19942975140 is 4157924991.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 290434 + ... + 352473.

It is an arithmetic number, because the mean of its divisors is an integer number (648051264).

Almost surely, 2^19942975140 is an apocalyptic number.

19942975140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19942975140 is an abundant number, since it is smaller than the sum of its proper divisors (42269946204).

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

19942975140 is a wasteful number, since it uses less digits than its factorization.

19942975140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642977 (or 642975 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 19942975140 in words is "nineteen billion, nine hundred forty-two million, nine hundred seventy-five thousand, one hundred forty".