21313233013 has 16 divisors (see below), whose sum is σ = 22693233024. Its totient is φ = 19947432960.

The previous prime is 21313232989. The next prime is 21313233017. The reversal of 21313233013 is 31033231312.

It is a cyclic number.

It is not a de Polignac number, because 21313233013 - 2⁵ = 21313232981 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 (21313233017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6623581 + ... + 6626797.

It is an arithmetic number, because the mean of its divisors is an integer number (1418327064).

Almost surely, 2^21313233013 is an apocalyptic number.

It is an amenable number.

21313233013 is a deficient number, since it is larger than the sum of its proper divisors (1380000011).

21313233013 is a wasteful number, since it uses less digits than its factorization.

21313233013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5292.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21313233013 its reverse (31033231312), we get a palindrome (52346464325).

The spelling of 21313233013 in words is "twenty-one billion, three hundred thirteen million, two hundred thirty-three thousand, thirteen".