19876946634 has 36 divisors (see below), whose sum is σ = 45452700306. Its totient is φ = 6276928464.

The previous prime is 19876946549. The next prime is 19876946641. The reversal of 19876946634 is 43664967891.

19876946634 is a `hidden beast` number, since 1 + 9 + 87 + 69 + 466 + 34 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17412122025 + 2464824609 = 131955^2 + 49647^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1522969 + ... + 1535964.

Almost surely, 2^19876946634 is an apocalyptic number.

19876946634 is an abundant number, since it is smaller than the sum of its proper divisors (25575753672).

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

19876946634 is a wasteful number, since it uses less digits than its factorization.

19876946634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058979 (or 3058957 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 63.

The spelling of 19876946634 in words is "nineteen billion, eight hundred seventy-six million, nine hundred forty-six thousand, six hundred thirty-four".