21313401413 has 4 divisors (see below), whose sum is σ = 21314791008. Its totient is φ = 21312011820.

The previous prime is 21313401409. The next prime is 21313401443. The reversal of 21313401413 is 31410431312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21313401413 - 2² = 21313401409 is a prime.

It is a super-2 number, since 2×21313401413² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313401443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671531 + ... + 702552.

It is an arithmetic number, because the mean of its divisors is an integer number (5328697752).

Almost surely, 2^21313401413 is an apocalyptic number.

It is an amenable number.

21313401413 is a deficient number, since it is larger than the sum of its proper divisors (1389595).

21313401413 is a wasteful number, since it uses less digits than its factorization.

21313401413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389594.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21313401413 its reverse (31410431312), we get a palindrome (52723832725).

The spelling of 21313401413 in words is "twenty-one billion, three hundred thirteen million, four hundred one thousand, four hundred thirteen".