20402311320402 has 64 divisors (see below), whose sum is σ = 44687891289600. Its totient is φ = 6158432170880.

The previous prime is 20402311320397. The next prime is 20402311320403.

It is a happy number.

20402311320402 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (20402311320403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16956049 + ... + 18119387.

It is an arithmetic number, because the mean of its divisors is an integer number (698248301400).

Almost surely, 2^{20402311320402} is an apocalyptic number.

20402311320402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20402311320402 is an abundant number, since it is smaller than the sum of its proper divisors (24285579969198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20402311320402 is a wasteful number, since it uses less digits than its factorization.

20402311320402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164391.

The product of its (nonzero) digits is 2304, while the sum is 24.

It can be divided in two parts, 2040231 and 1320402, that added together give a palindrome (3360633).

The spelling of 20402311320402 in words is "twenty trillion, four hundred two billion, three hundred eleven million, three hundred twenty thousand, four hundred two".