21072871914 has 8 divisors (see below), whose sum is σ = 42145743840. Its totient is φ = 7024290636.

The previous prime is 21072871907. The next prime is 21072871931. The reversal of 21072871914 is 41917827012.

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

21072871914 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1756072654 + ... + 1756072665.

It is an arithmetic number, because the mean of its divisors is an integer number (5268217980).

Almost surely, 2^21072871914 is an apocalyptic number.

21072871914 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21072871914 is a wasteful number, since it uses less digits than its factorization.

21072871914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512145324.

The product of its (nonzero) digits is 56448, while the sum is 42.

The spelling of 21072871914 in words is "twenty-one billion, seventy-two million, eight hundred seventy-one thousand, nine hundred fourteen".