13840343931 has 16 divisors (see below), whose sum is σ = 19118576160. Its totient is φ = 8895452160.

The previous prime is 13840343921. The next prime is 13840343939. The reversal of 13840343931 is 13934304831.

It is not a de Polignac number, because 13840343931 - 2²³ = 13831955323 is a prime.

It is a super-2 number, since 2×13840343931² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13840343931.

It is not an unprimeable number, because it can be changed into a prime (13840343939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59640 + ... + 176741.

It is an arithmetic number, because the mean of its divisors is an integer number (1194911010).

Almost surely, 2^13840343931 is an apocalyptic number.

13840343931 is a deficient number, since it is larger than the sum of its proper divisors (5278232229).

13840343931 is a wasteful number, since it uses less digits than its factorization.

13840343931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237086.

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 13840343931 in words is "thirteen billion, eight hundred forty million, three hundred forty-three thousand, nine hundred thirty-one".