21131314413 has 32 divisors (see below), whose sum is σ = 30864998400. Its totient is φ = 12753417600.

The previous prime is 21131314409. The next prime is 21131314487. The reversal of 21131314413 is 31441313112.

It is a happy number.

It is not a de Polignac number, because 21131314413 - 2² = 21131314409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131314403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15995793 + ... + 15997113.

It is an arithmetic number, because the mean of its divisors is an integer number (964531200).

Almost surely, 2^21131314413 is an apocalyptic number.

It is an amenable number.

21131314413 is a deficient number, since it is larger than the sum of its proper divisors (9733683987).

21131314413 is a wasteful number, since it uses less digits than its factorization.

21131314413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2993.

The product of its digits is 864, while the sum is 24.

Adding to 21131314413 its reverse (31441313112), we get a palindrome (52572627525).

The spelling of 21131314413 in words is "twenty-one billion, one hundred thirty-one million, three hundred fourteen thousand, four hundred thirteen".