13943640237 has 16 divisors (see below), whose sum is σ = 18673304832. Its totient is φ = 9254917440.

The previous prime is 13943640199. The next prime is 13943640251. The reversal of 13943640237 is 73204634931.

It is a happy number.

It is not a de Polignac number, because 13943640237 - 2¹⁴ = 13943623853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13943640437) 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, 1325643 + ... + 1336119.

It is an arithmetic number, because the mean of its divisors is an integer number (1167081552).

Almost surely, 2^13943640237 is an apocalyptic number.

It is an amenable number.

13943640237 is a deficient number, since it is larger than the sum of its proper divisors (4729664595).

13943640237 is a wasteful number, since it uses less digits than its factorization.

13943640237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12388.

The product of its (nonzero) digits is 326592, while the sum is 42.

The spelling of 13943640237 in words is "thirteen billion, nine hundred forty-three million, six hundred forty thousand, two hundred thirty-seven".