13402020431 has 4 divisors (see below), whose sum is σ = 14190374592. Its totient is φ = 12613666272.

The previous prime is 13402020419. The next prime is 13402020461.

13402020431 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13402020431 is a prime.

It is a super-2 number, since 2×13402020431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13402020461) 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 3 ways as a sum of consecutive naturals, for example, 394177055 + ... + 394177088.

It is an arithmetic number, because the mean of its divisors is an integer number (3547593648).

Almost surely, 2^13402020431 is an apocalyptic number.

13402020431 is a deficient number, since it is larger than the sum of its proper divisors (788354161).

13402020431 is an equidigital number, since it uses as much as digits as its factorization.

13402020431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788354160.

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

It can be divided in two parts, 134020 and 20431, that added together give a palindrome (154451).

The spelling of 13402020431 in words is "thirteen billion, four hundred two million, twenty thousand, four hundred thirty-one".