31366643023 has 4 divisors (see below), whose sum is σ = 31367994448. Its totient is φ = 31365291600.

The previous prime is 31366642997. The next prime is 31366643029. The reversal of 31366643023 is 32034666313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31366643023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31366643029) 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, 640278 + ... + 687523.

It is an arithmetic number, because the mean of its divisors is an integer number (7841998612).

Almost surely, 2^31366643023 is an apocalyptic number.

31366643023 is a deficient number, since it is larger than the sum of its proper divisors (1351425).

31366643023 is a wasteful number, since it uses less digits than its factorization.

31366643023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351424.

The product of its (nonzero) digits is 139968, while the sum is 37.

The spelling of 31366643023 in words is "thirty-one billion, three hundred sixty-six million, six hundred forty-three thousand, twenty-three".