20310123399 has 16 divisors (see below), whose sum is σ = 27231688320. Its totient is φ = 13464430560.

The previous prime is 20310123391. The next prime is 20310123413. The reversal of 20310123399 is 99332101302.

It is not a de Polignac number, because 20310123399 - 2³ = 20310123391 is a prime.

It is a super-2 number, since 2×20310123399² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310123391) 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, 764904 + ... + 791010.

It is an arithmetic number, because the mean of its divisors is an integer number (1701980520).

Almost surely, 2^20310123399 is an apocalyptic number.

20310123399 is a deficient number, since it is larger than the sum of its proper divisors (6921564921).

20310123399 is a wasteful number, since it uses less digits than its factorization.

20310123399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27550.

The product of its (nonzero) digits is 8748, while the sum is 33.

The spelling of 20310123399 in words is "twenty billion, three hundred ten million, one hundred twenty-three thousand, three hundred ninety-nine".