21973072814 has 64 divisors (see below), whose sum is σ = 42588149760. Its totient is φ = 8250439680.

The previous prime is 21973072783. The next prime is 21973072871. The reversal of 21973072814 is 41827037912.

It is a congruent number.

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, 2572619 + ... + 2581145.

It is an arithmetic number, because the mean of its divisors is an integer number (665439840).

Almost surely, 2^21973072814 is an apocalyptic number.

21973072814 is a deficient number, since it is larger than the sum of its proper divisors (20615076946).

21973072814 is a wasteful number, since it uses less digits than its factorization.

21973072814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9153.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 21973072814 in words is "twenty-one billion, nine hundred seventy-three million, seventy-two thousand, eight hundred fourteen".