21232302013 has 8 divisors (see below), whose sum is σ = 22867367768. Its totient is φ = 19597495104.

The previous prime is 21232301969. The next prime is 21232302017. The reversal of 21232302013 is 31020323212.

It can be written as a sum of positive squares in 4 ways, for example, as 3329059204 + 17903242809 = 57698^2 + 133803^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21232302013 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 (21232302017) 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, 126631 + ... + 241867.

It is an arithmetic number, because the mean of its divisors is an integer number (2858420971).

Almost surely, 2^21232302013 is an apocalyptic number.

It is an amenable number.

21232302013 is a deficient number, since it is larger than the sum of its proper divisors (1635065755).

21232302013 is a wasteful number, since it uses less digits than its factorization.

21232302013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129423.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21232302013 its reverse (31020323212), we get a palindrome (52252625225).

The spelling of 21232302013 in words is "twenty-one billion, two hundred thirty-two million, three hundred two thousand, thirteen".