13047390021 has 24 divisors (see below), whose sum is σ = 18547556544. Its totient is φ = 8142956800.

The previous prime is 13047390017. The next prime is 13047390071. The reversal of 13047390021 is 12009374031.

It is not a de Polignac number, because 13047390021 - 2² = 13047390017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13047390011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109621 + ... + 195221.

It is an arithmetic number, because the mean of its divisors is an integer number (772814856).

Almost surely, 2^13047390021 is an apocalyptic number.

It is an amenable number.

13047390021 is a deficient number, since it is larger than the sum of its proper divisors (5500166523).

13047390021 is an equidigital number, since it uses as much as digits as its factorization.

13047390021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85721 (or 85674 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The spelling of 13047390021 in words is "thirteen billion, forty-seven million, three hundred ninety thousand, twenty-one".