20031122313 has 16 divisors (see below), whose sum is σ = 29684139840. Its totient is φ = 13350300192.

The previous prime is 20031122299. The next prime is 20031122329. The reversal of 20031122313 is 31322113002.

20031122313 is a `hidden beast` number, since 20 + 0 + 311 + 22 + 313 = 666.

It is not a de Polignac number, because 20031122313 - 2⁶ = 20031122249 is a prime.

It is a super-2 number, since 2×20031122313² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20031122413) 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, 6231 + ... + 200252.

It is an arithmetic number, because the mean of its divisors is an integer number (1855258740).

Almost surely, 2^20031122313 is an apocalyptic number.

It is an amenable number.

20031122313 is a deficient number, since it is larger than the sum of its proper divisors (9653017527).

20031122313 is a wasteful number, since it uses less digits than its factorization.

20031122313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210085 (or 210079 counting only the distinct ones).

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

Adding to 20031122313 its reverse (31322113002), we get a palindrome (51353235315).

The spelling of 20031122313 in words is "twenty billion, thirty-one million, one hundred twenty-two thousand, three hundred thirteen".