18226695672 has 48 divisors (see below), whose sum is σ = 49381572240. Its totient is φ = 6073398528.

The previous prime is 18226695653. The next prime is 18226695731. The reversal of 18226695672 is 27659662281.

18226695672 is a `hidden beast` number, since 18 + 2 + 2 + 6 + 69 + 567 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164893 + ... + 252275.

It is an arithmetic number, because the mean of its divisors is an integer number (1028782755).

Almost surely, 2^18226695672 is an apocalyptic number.

18226695672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18226695672 is an abundant number, since it is smaller than the sum of its proper divisors (31154876568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18226695672 is a wasteful number, since it uses less digits than its factorization.

18226695672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90292 (or 90285 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 18226695672 in words is "eighteen billion, two hundred twenty-six million, six hundred ninety-five thousand, six hundred seventy-two".