19716910974 has 20 divisors (see below), whose sum is σ = 44180486064. Its totient is φ = 6572303604.

The previous prime is 19716910973. The next prime is 19716910987. The reversal of 19716910974 is 47901961791.

19716910974 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 19716910974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19716910973) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 60854502 + ... + 60854825.

Almost surely, 2^19716910974 is an apocalyptic number.

19716910974 is an abundant number, since it is smaller than the sum of its proper divisors (24463575090).

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

19716910974 is a wasteful number, since it uses less digits than its factorization.

19716910974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121709341 (or 121709332 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 54.

The spelling of 19716910974 in words is "nineteen billion, seven hundred sixteen million, nine hundred ten thousand, nine hundred seventy-four".