21064048713 has 12 divisors (see below), whose sum is σ = 32215604148. Its totient is φ = 13216657920.

The previous prime is 21064048699. The next prime is 21064048787. The reversal of 21064048713 is 31784046012.

21064048713 is a `hidden beast` number, since 2 + 1 + 0 + 640 + 4 + 8 + 7 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14514707529 + 6549341184 = 120477^2 + 80928^2 .

It is not a de Polignac number, because 21064048713 - 2⁴ = 21064048697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21064048813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68836608 + ... + 68836913.

It is an arithmetic number, because the mean of its divisors is an integer number (2684633679).

Almost surely, 2^21064048713 is an apocalyptic number.

It is an amenable number.

21064048713 is a deficient number, since it is larger than the sum of its proper divisors (11151555435).

21064048713 is a wasteful number, since it uses less digits than its factorization.

21064048713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137673544 (or 137673541 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 21064048713 in words is "twenty-one billion, sixty-four million, forty-eight thousand, seven hundred thirteen".