20310123412 has 36 divisors (see below), whose sum is σ = 37426980276. Its totient is φ = 9642497920.

The previous prime is 20310123391. The next prime is 20310123413. The reversal of 20310123412 is 21432101302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8514860176 + 11795263236 = 92276^2 + 108606^2 .

It is a super-2 number, since 2×20310123412² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20310123412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310123413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254862 + ... + 324922.

It is an arithmetic number, because the mean of its divisors is an integer number (1039638341).

Almost surely, 2^20310123412 is an apocalyptic number.

It is an amenable number.

20310123412 is a deficient number, since it is larger than the sum of its proper divisors (17116856864).

20310123412 is a wasteful number, since it uses less digits than its factorization.

20310123412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70248 (or 70223 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20310123412 its reverse (21432101302), we get a palindrome (41742224714).

The spelling of 20310123412 in words is "twenty billion, three hundred ten million, one hundred twenty-three thousand, four hundred twelve".