19935902730 has 64 divisors (see below), whose sum is σ = 49037498496. Its totient is φ = 5184000000.

The previous prime is 19935902699. The next prime is 19935902743. The reversal of 19935902730 is 3720953991.

It is a self number, because there is not a number n which added to its sum of digits gives 19935902730.

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, 4919205 + ... + 4923255.

It is an arithmetic number, because the mean of its divisors is an integer number (766210914).

Almost surely, 2^19935902730 is an apocalyptic number.

19935902730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19935902730 is an abundant number, since it is smaller than the sum of its proper divisors (29101595766).

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

19935902730 is a wasteful number, since it uses less digits than its factorization.

19935902730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8103.

The product of its (nonzero) digits is 459270, while the sum is 48.

The spelling of 19935902730 in words is "nineteen billion, nine hundred thirty-five million, nine hundred two thousand, seven hundred thirty".