31402020413 has 4 divisors (see below), whose sum is σ = 31442856060. Its totient is φ = 31361184768.

The previous prime is 31402020409. The next prime is 31402020427.

31402020413 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15957247684 + 15444772729 = 126322^2 + 124277^2 .

It is a cyclic number.

It is not a de Polignac number, because 31402020413 - 2² = 31402020409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402020913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20416670 + ... + 20418207.

It is an arithmetic number, because the mean of its divisors is an integer number (7860714015).

Almost surely, 2^31402020413 is an apocalyptic number.

It is an amenable number.

31402020413 is a deficient number, since it is larger than the sum of its proper divisors (40835647).

31402020413 is an equidigital number, since it uses as much as digits as its factorization.

31402020413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40835646.

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

It can be divided in two parts, 314020 and 20413, that added together give a palindrome (334433).

The spelling of 31402020413 in words is "thirty-one billion, four hundred two million, twenty thousand, four hundred thirteen".