218972937807 has 24 divisors (see below), whose sum is σ = 341573450400. Its totient is φ = 134377195968.

The previous prime is 218972937793. The next prime is 218972937809. The reversal of 218972937807 is 708739279812.

It is a de Polignac number, because none of the positive numbers 2^k-218972937807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218972937809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2564632 + ... + 2648637.

It is an arithmetic number, because the mean of its divisors is an integer number (14232227100).

Almost surely, 2^218972937807 is an apocalyptic number.

218972937807 is a deficient number, since it is larger than the sum of its proper divisors (122600512593).

218972937807 is a wasteful number, since it uses less digits than its factorization.

218972937807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5213647 (or 5213644 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 63.

The spelling of 218972937807 in words is "two hundred eighteen billion, nine hundred seventy-two million, nine hundred thirty-seven thousand, eight hundred seven".