21976612874 has 8 divisors (see below), whose sum is σ = 33013613988. Its totient is φ = 10972074880.

The previous prime is 21976612859. The next prime is 21976612877. The reversal of 21976612874 is 47821667912.

It can be written as a sum of positive squares in 2 ways, for example, as 16232034025 + 5744578849 = 127405^2 + 75793^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21976612877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8114087 + ... + 8116794.

Almost surely, 2^21976612874 is an apocalyptic number.

21976612874 is a deficient number, since it is larger than the sum of its proper divisors (11037001114).

21976612874 is a wasteful number, since it uses less digits than its factorization.

21976612874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16231560.

The product of its digits is 2032128, while the sum is 53.

The spelling of 21976612874 in words is "twenty-one billion, nine hundred seventy-six million, six hundred twelve thousand, eight hundred seventy-four".