21313014420 has 48 divisors (see below), whose sum is σ = 61131970368. Its totient is φ = 5544848640.

The previous prime is 21313014413. The next prime is 21313014439. The reversal of 21313014420 is 2441031312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4329454 + ... + 4334373.

It is an arithmetic number, because the mean of its divisors is an integer number (1273582716).

Almost surely, 2^21313014420 is an apocalyptic number.

21313014420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21313014420 is an abundant number, since it is smaller than the sum of its proper divisors (39818955948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21313014420 is a wasteful number, since it uses less digits than its factorization.

21313014420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8663880 (or 8663878 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21313014420 its reverse (2441031312), we get a palindrome (23754045732).

The spelling of 21313014420 in words is "twenty-one billion, three hundred thirteen million, fourteen thousand, four hundred twenty".