21214085379 has 16 divisors (see below), whose sum is σ = 28467298944. Its totient is φ = 14052024000.

The previous prime is 21214085359. The next prime is 21214085381. The reversal of 21214085379 is 97358041212.

It is not a de Polignac number, because 21214085379 - 2²⁷ = 21079867651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21214085379.

It is not an unprimeable number, because it can be changed into a prime (21214085359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 352552 + ... + 408314.

It is an arithmetic number, because the mean of its divisors is an integer number (1779206184).

Almost surely, 2^21214085379 is an apocalyptic number.

21214085379 is a deficient number, since it is larger than the sum of its proper divisors (7253213565).

21214085379 is a wasteful number, since it uses less digits than its factorization.

21214085379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56578.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 21214085379 in words is "twenty-one billion, two hundred fourteen million, eighty-five thousand, three hundred seventy-nine".