21627897712 has 40 divisors (see below), whose sum is σ = 43066304096. Its totient is φ = 10514416896.

The previous prime is 21627897661. The next prime is 21627897713. The reversal of 21627897712 is 21779872612.

It is a self number, because there is not a number n which added to its sum of digits gives 21627897712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21627897713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901618 + ... + 925294.

Almost surely, 2^21627897712 is an apocalyptic number.

It is an amenable number.

21627897712 is a deficient number, since it is larger than the sum of its proper divisors (21438406384).

21627897712 is a wasteful number, since it uses less digits than its factorization.

21627897712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25265 (or 25259 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 52.

The spelling of 21627897712 in words is "twenty-one billion, six hundred twenty-seven million, eight hundred ninety-seven thousand, seven hundred twelve".