21320431014 has 16 divisors (see below), whose sum is σ = 42703301952. Its totient is φ = 7096403688.

The previous prime is 21320431007. The next prime is 21320431019. The reversal of 21320431014 is 41013402312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320431019) 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, 2597224 + ... + 2605419.

It is an arithmetic number, because the mean of its divisors is an integer number (2668956372).

Almost surely, 2^21320431014 is an apocalyptic number.

21320431014 is an abundant number, since it is smaller than the sum of its proper divisors (21382870938).

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

21320431014 is a wasteful number, since it uses less digits than its factorization.

21320431014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203331.

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

Adding to 21320431014 its reverse (41013402312), we get a palindrome (62333833326).

The spelling of 21320431014 in words is "twenty-one billion, three hundred twenty million, four hundred thirty-one thousand, fourteen".