18749396271 has 16 divisors (see below), whose sum is σ = 26502432768. Its totient is φ = 11749795200.

The previous prime is 18749396257. The next prime is 18749396279. The reversal of 18749396271 is 17269394781.

It is a happy number.

It is not a de Polignac number, because 18749396271 - 2⁷ = 18749396143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18749396279) 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, 185295 + ... + 268016.

It is an arithmetic number, because the mean of its divisors is an integer number (1656402048).

Almost surely, 2^18749396271 is an apocalyptic number.

18749396271 is a deficient number, since it is larger than the sum of its proper divisors (7753036497).

18749396271 is a wasteful number, since it uses less digits than its factorization.

18749396271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454142.

The product of its digits is 4572288, while the sum is 57.

The spelling of 18749396271 in words is "eighteen billion, seven hundred forty-nine million, three hundred ninety-six thousand, two hundred seventy-one".