19757936690 has 32 divisors (see below), whose sum is σ = 38110020480. Its totient is φ = 7348658944.

The previous prime is 19757936647. The next prime is 19757936717. The reversal of 19757936690 is 9663975791.

It is a super-2 number, since 2×19757936690² (a number of 21 digits) contains 22 as substring.

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, 686030 + ... + 714249.

It is an arithmetic number, because the mean of its divisors is an integer number (1190938140).

Almost surely, 2^19757936690 is an apocalyptic number.

19757936690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19757936690 is a deficient number, since it is larger than the sum of its proper divisors (18352083790).

19757936690 is a wasteful number, since it uses less digits than its factorization.

19757936690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400386.

The product of its (nonzero) digits is 19289340, while the sum is 62.

The spelling of 19757936690 in words is "nineteen billion, seven hundred fifty-seven million, nine hundred thirty-six thousand, six hundred ninety".