19713634451 has 32 divisors (see below), whose sum is σ = 23355053568. Its totient is φ = 16291342080.

The previous prime is 19713634387. The next prime is 19713634453. The reversal of 19713634451 is 15443631791.

It is a cyclic number.

It is not a de Polignac number, because 19713634451 - 2⁶ = 19713634387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19713634453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8313296 + ... + 8315666.

It is an arithmetic number, because the mean of its divisors is an integer number (729845424).

Almost surely, 2^19713634451 is an apocalyptic number.

19713634451 is a deficient number, since it is larger than the sum of its proper divisors (3641419117).

19713634451 is a wasteful number, since it uses less digits than its factorization.

19713634451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811.

The product of its digits is 272160, while the sum is 44.

The spelling of 19713634451 in words is "nineteen billion, seven hundred thirteen million, six hundred thirty-four thousand, four hundred fifty-one".