20312103402331 has 8 divisors (see below), whose sum is σ = 21874619836944. Its totient is φ = 18749593673760.

The previous prime is 20312103402313. The next prime is 20312103402401. The reversal of 20312103402331 is 13320430121302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20312103402331 - 2⁵ = 20312103402299 is a prime.

It is a super-2 number, since 2×20312103402331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20312103402296 and 20312103402305.

It is not an unprimeable number, because it can be changed into a prime (20312103402301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5873736 + ... + 8667466.

It is an arithmetic number, because the mean of its divisors is an integer number (2734327479618).

Almost surely, 2^{20312103402331} is an apocalyptic number.

20312103402331 is a deficient number, since it is larger than the sum of its proper divisors (1562516434613).

20312103402331 is a wasteful number, since it uses less digits than its factorization.

20312103402331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353021.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 20312103402331 its reverse (13320430121302), we get a palindrome (33632533523633).

The spelling of 20312103402331 in words is "twenty trillion, three hundred twelve billion, one hundred three million, four hundred two thousand, three hundred thirty-one".