21404752713 has 16 divisors (see below), whose sum is σ = 31741483840. Its totient is φ = 14256002592.

The previous prime is 21404752693. The next prime is 21404752741. The reversal of 21404752713 is 31725740412.

It is not a de Polignac number, because 21404752713 - 2¹³ = 21404744521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21404792713) 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, 355831 + ... + 411612.

It is an arithmetic number, because the mean of its divisors is an integer number (1983842740).

Almost surely, 2^21404752713 is an apocalyptic number.

It is an amenable number.

21404752713 is a deficient number, since it is larger than the sum of its proper divisors (10336731127).

21404752713 is a wasteful number, since it uses less digits than its factorization.

21404752713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768485 (or 768479 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The spelling of 21404752713 in words is "twenty-one billion, four hundred four million, seven hundred fifty-two thousand, seven hundred thirteen".