18896772236 has 12 divisors (see below), whose sum is σ = 33378411528. Its totient is φ = 9360083232.

The previous prime is 18896772233. The next prime is 18896772283. The reversal of 18896772236 is 63227769881.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18896772233) 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 3 ways as a sum of consecutive naturals, for example, 22075241 + ... + 22076096.

It is an arithmetic number, because the mean of its divisors is an integer number (2781534294).

Almost surely, 2^18896772236 is an apocalyptic number.

It is an amenable number.

18896772236 is a deficient number, since it is larger than the sum of its proper divisors (14481639292).

18896772236 is a wasteful number, since it uses less digits than its factorization.

18896772236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44151448 (or 44151446 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 59.

The spelling of 18896772236 in words is "eighteen billion, eight hundred ninety-six million, seven hundred seventy-two thousand, two hundred thirty-six".