21530403853013 has 32 divisors (see below), whose sum is σ = 24439577057280. Its totient is φ = 18795378096000.

The previous prime is 21530403852967. The next prime is 21530403853031. The reversal of 21530403853013 is 31035830403512.

It is not a de Polignac number, because 21530403853013 - 2¹⁸ = 21530403590869 is a prime.

It is a super-2 number, since 2×21530403853013² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21530403853033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36907718 + ... + 37486536.

It is an arithmetic number, because the mean of its divisors is an integer number (763736783040).

Almost surely, 2^{21530403853013} is an apocalyptic number.

It is an amenable number.

21530403853013 is a deficient number, since it is larger than the sum of its proper divisors (2909173204267).

21530403853013 is a wasteful number, since it uses less digits than its factorization.

21530403853013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580169.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 21530403853013 in words is "twenty-one trillion, five hundred thirty billion, four hundred three million, eight hundred fifty-three thousand, thirteen".