19919750356 has 36 divisors (see below), whose sum is σ = 38618535424. Its totient is φ = 8983109520.

The previous prime is 19919750317. The next prime is 19919750363. The reversal of 19919750356 is 65305791991.

It is a junction number, because it is equal to n+sod(n) for n = 19919750297 and 19919750306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100566 + ... + 223501.

Almost surely, 2^19919750356 is an apocalyptic number.

It is an amenable number.

19919750356 is a deficient number, since it is larger than the sum of its proper divisors (18698785068).

19919750356 is a wasteful number, since it uses less digits than its factorization.

19919750356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324220 (or 324207 counting only the distinct ones).

The product of its (nonzero) digits is 2296350, while the sum is 55.

The spelling of 19919750356 in words is "nineteen billion, nine hundred nineteen million, seven hundred fifty thousand, three hundred fifty-six".