18272865771 has 24 divisors (see below), whose sum is σ = 26570166480. Its totient is φ = 12100815936.

The previous prime is 18272865757. The next prime is 18272865799. The reversal of 18272865771 is 17756827281.

It is not a de Polignac number, because 18272865771 - 2⁵ = 18272865739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18272865731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1626345 + ... + 1637541.

It is an arithmetic number, because the mean of its divisors is an integer number (1107090270).

Almost surely, 2^18272865771 is an apocalyptic number.

18272865771 is a deficient number, since it is larger than the sum of its proper divisors (8297300709).

18272865771 is a wasteful number, since it uses less digits than its factorization.

18272865771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12395 (or 12392 counting only the distinct ones).

The product of its digits is 2634240, while the sum is 54.

The spelling of 18272865771 in words is "eighteen billion, two hundred seventy-two million, eight hundred sixty-five thousand, seven hundred seventy-one".