13885006431 has 4 divisors (see below), whose sum is σ = 18513341912. Its totient is φ = 9256670952.

The previous prime is 13885006427. The next prime is 13885006451. The reversal of 13885006431 is 13460058831.

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

It is not a de Polignac number, because 13885006431 - 2² = 13885006427 is a prime.

It is a super-2 number, since 2×13885006431² (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 13885006431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13885006451) 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, 2314167736 + ... + 2314167741.

It is an arithmetic number, because the mean of its divisors is an integer number (4628335478).

Almost surely, 2^13885006431 is an apocalyptic number.

13885006431 is a deficient number, since it is larger than the sum of its proper divisors (4628335481).

13885006431 is an equidigital number, since it uses as much as digits as its factorization.

13885006431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628335480.

The product of its (nonzero) digits is 69120, while the sum is 39.

It can be divided in two parts, 1388500 and 6431, that added together give a palindrome (1394931).

The spelling of 13885006431 in words is "thirteen billion, eight hundred eighty-five million, six thousand, four hundred thirty-one".