21470017760713 has 4 divisors (see below), whose sum is σ = 21471822430740. Its totient is φ = 21468213090688.

The previous prime is 21470017760707. The next prime is 21470017760761. The reversal of 21470017760713 is 31706771007412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12878717448249 + 8591300312464 = 3588693^2 + 2931092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21470017760713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21470017770713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902317168 + ... + 902340961.

It is an arithmetic number, because the mean of its divisors is an integer number (5367955607685).

Almost surely, 2^{21470017760713} is an apocalyptic number.

It is an amenable number.

21470017760713 is a deficient number, since it is larger than the sum of its proper divisors (1804670027).

21470017760713 is a wasteful number, since it uses less digits than its factorization.

21470017760713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804670026.

The product of its (nonzero) digits is 345744, while the sum is 46.

The spelling of 21470017760713 in words is "twenty-one trillion, four hundred seventy billion, seventeen million, seven hundred sixty thousand, seven hundred thirteen".