21280927914 has 12 divisors (see below), whose sum is σ = 46108677186. Its totient is φ = 7093642632.

The previous prime is 21280927897. The next prime is 21280928033. The reversal of 21280927914 is 41972908212.

It can be written as a sum of positive squares in only one way, i.e., 19492906689 + 1788021225 = 139617^2 + 42285^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21280927914.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 591136869 + ... + 591136904.

Almost surely, 2^21280927914 is an apocalyptic number.

21280927914 is an abundant number, since it is smaller than the sum of its proper divisors (24827749272).

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

21280927914 is a wasteful number, since it uses less digits than its factorization.

21280927914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182273781 (or 1182273778 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 21280927914 in words is "twenty-one billion, two hundred eighty million, nine hundred twenty-seven thousand, nine hundred fourteen".