21313502654399 has 8 divisors (see below), whose sum is σ = 21688300526592. Its totient is φ = 20939524014240.

The previous prime is 21313502654363. The next prime is 21313502654413. The reversal of 21313502654399 is 99345620531312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21313502654399 - 2³⁶ = 21244783177663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21313502654399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313502654999) 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, 204755519 + ... + 204859584.

It is an arithmetic number, because the mean of its divisors is an integer number (2711037565824).

Almost surely, 2^{21313502654399} is an apocalyptic number.

21313502654399 is a deficient number, since it is larger than the sum of its proper divisors (374797872193).

21313502654399 is an equidigital number, since it uses as much as digits as its factorization.

21313502654399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409616017.

The product of its (nonzero) digits is 5248800, while the sum is 53.

The spelling of 21313502654399 in words is "twenty-one trillion, three hundred thirteen billion, five hundred two million, six hundred fifty-four thousand, three hundred ninety-nine".