19976542685 has 16 divisors (see below), whose sum is σ = 26302285440. Its totient is φ = 14444408640.

The previous prime is 19976542679. The next prime is 19976542717. The reversal of 19976542685 is 58624567991.

It is not a de Polignac number, because 19976542685 - 2⁴ = 19976542669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1040225 + ... + 1059254.

It is an arithmetic number, because the mean of its divisors is an integer number (1643892840).

Almost surely, 2^19976542685 is an apocalyptic number.

It is an amenable number.

19976542685 is a deficient number, since it is larger than the sum of its proper divisors (6325742755).

19976542685 is a wasteful number, since it uses less digits than its factorization.

19976542685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099668.

The product of its digits is 32659200, while the sum is 62.

The spelling of 19976542685 in words is "nineteen billion, nine hundred seventy-six million, five hundred forty-two thousand, six hundred eighty-five".