20312023412 has 12 divisors (see below), whose sum is σ = 35559085380. Its totient is φ = 10152284736.

The previous prime is 20312023399. The next prime is 20312023447. The reversal of 20312023412 is 21432021302.

It can be written as a sum of positive squares in 2 ways, for example, as 10667997796 + 9644025616 = 103286^2 + 98204^2 .

It is a super-2 number, since 2×20312023412² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919463 + ... + 941294.

It is an arithmetic number, because the mean of its divisors is an integer number (2963257115).

Almost surely, 2^20312023412 is an apocalyptic number.

It is an amenable number.

20312023412 is a deficient number, since it is larger than the sum of its proper divisors (15247061968).

20312023412 is a wasteful number, since it uses less digits than its factorization.

20312023412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863490 (or 1863488 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20312023412 its reverse (21432021302), we get a palindrome (41744044714).

The spelling of 20312023412 in words is "twenty billion, three hundred twelve million, twenty-three thousand, four hundred twelve".