20312013111 has 16 divisors (see below), whose sum is σ = 29168616960. Its totient is φ = 12498564960.

The previous prime is 20312013103. The next prime is 20312013119. The reversal of 20312013111 is 11131021302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20312013103) and next prime (20312013119).

It is not a de Polignac number, because 20312013111 - 2³ = 20312013103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312013119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664870 + ... + 694748.

It is an arithmetic number, because the mean of its divisors is an integer number (1823038560).

Almost surely, 2^20312013111 is an apocalyptic number.

20312013111 is a deficient number, since it is larger than the sum of its proper divisors (8856603849).

20312013111 is a wasteful number, since it uses less digits than its factorization.

20312013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47326.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 20312013111 its reverse (11131021302), we get a palindrome (31443034413).

The spelling of 20312013111 in words is "twenty billion, three hundred twelve million, thirteen thousand, one hundred eleven".