20131022313 has 16 divisors (see below), whose sum is σ = 29826014400. Its totient is φ = 13419656640.

The previous prime is 20131022309. The next prime is 20131022323. The reversal of 20131022313 is 31322013102.

20131022313 is a `hidden beast` number, since 20 + 1 + 310 + 22 + 313 = 666.

It is not a de Polignac number, because 20131022313 - 2² = 20131022309 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20131022323) 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, 532833 + ... + 569361.

It is an arithmetic number, because the mean of its divisors is an integer number (1864125900).

Almost surely, 2^20131022313 is an apocalyptic number.

It is an amenable number.

20131022313 is a deficient number, since it is larger than the sum of its proper divisors (9694992087).

20131022313 is a wasteful number, since it uses less digits than its factorization.

20131022313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56949 (or 56943 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20131022313 its reverse (31322013102), we get a palindrome (51453035415).

The spelling of 20131022313 in words is "twenty billion, one hundred thirty-one million, twenty-two thousand, three hundred thirteen".