13402956808021 has 8 divisors (see below), whose sum is σ = 14839637389344. Its totient is φ = 12002647887120.

The previous prime is 13402956808013. The next prime is 13402956808027. The reversal of 13402956808021 is 12080865920431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13402956808021 - 2³ = 13402956808013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402956808027) 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, 9092914330 + ... + 9092915803.

It is an arithmetic number, because the mean of its divisors is an integer number (1854954673668).

Almost surely, 2^{13402956808021} is an apocalyptic number.

13402956808021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13402956808021 is a deficient number, since it is larger than the sum of its proper divisors (1436680581323).

13402956808021 is a wasteful number, since it uses less digits than its factorization.

13402956808021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18185830211.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 13402956808021 in words is "thirteen trillion, four hundred two billion, nine hundred fifty-six million, eight hundred eight thousand, twenty-one".