18764037227 has 4 divisors (see below), whose sum is σ = 20207424720. Its totient is φ = 17320649736.

The previous prime is 18764037191. The next prime is 18764037241. The reversal of 18764037227 is 72273046781.

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

It is not a de Polignac number, because 18764037227 - 2⁸ = 18764036971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18764057227) 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, 721693727 + ... + 721693752.

It is an arithmetic number, because the mean of its divisors is an integer number (5051856180).

Almost surely, 2^18764037227 is an apocalyptic number.

18764037227 is a deficient number, since it is larger than the sum of its proper divisors (1443387493).

18764037227 is a wasteful number, since it uses less digits than its factorization.

18764037227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443387492.

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 18764037227 in words is "eighteen billion, seven hundred sixty-four million, thirty-seven thousand, two hundred twenty-seven".