19647880674 has 64 divisors (see below), whose sum is σ = 40828233600. Its totient is φ = 6298311168.

The previous prime is 19647880661. The next prime is 19647880739. The reversal of 19647880674 is 47608874691.

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, 13767949 + ... + 13769375.

It is an arithmetic number, because the mean of its divisors is an integer number (637941150).

Almost surely, 2^19647880674 is an apocalyptic number.

19647880674 is an abundant number, since it is smaller than the sum of its proper divisors (21180352926).

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

19647880674 is a wasteful number, since it uses less digits than its factorization.

19647880674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147.

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 19647880674 in words is "nineteen billion, six hundred forty-seven million, eight hundred eighty thousand, six hundred seventy-four".