13641940939 has 4 divisors (see below), whose sum is σ = 14882117400. Its totient is φ = 12401764480.

The previous prime is 13641940931. The next prime is 13641940943. The reversal of 13641940939 is 93904914631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93904914631 = 11 ⋅8536810421.

It is a cyclic number.

It is not a de Polignac number, because 13641940939 - 2³ = 13641940931 is a prime.

It is a super-2 number, since 2×13641940939² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13641940892 and 13641940901.

It is not an unprimeable number, because it can be changed into a prime (13641940931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620088214 + ... + 620088235.

It is an arithmetic number, because the mean of its divisors is an integer number (3720529350).

Almost surely, 2^13641940939 is an apocalyptic number.

13641940939 is a deficient number, since it is larger than the sum of its proper divisors (1240176461).

13641940939 is a wasteful number, since it uses less digits than its factorization.

13641940939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240176460.

The product of its (nonzero) digits is 629856, while the sum is 49.

The spelling of 13641940939 in words is "thirteen billion, six hundred forty-one million, nine hundred forty thousand, nine hundred thirty-nine".