13120643431 has 8 divisors (see below), whose sum is σ = 15113093120. Its totient is φ = 11157711768.

The previous prime is 13120643423. The next prime is 13120643441. The reversal of 13120643431 is 13434602131.

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

It is not a de Polignac number, because 13120643431 - 2³ = 13120643423 is a prime.

It is a super-2 number, since 2×13120643431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13120643431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120643441) 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, 7378551 + ... + 7380328.

It is an arithmetic number, because the mean of its divisors is an integer number (1889136640).

Almost surely, 2^13120643431 is an apocalyptic number.

13120643431 is a deficient number, since it is larger than the sum of its proper divisors (1992449689).

13120643431 is a wasteful number, since it uses less digits than its factorization.

13120643431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14759013.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 13120643431 in words is "thirteen billion, one hundred twenty million, six hundred forty-three thousand, four hundred thirty-one".