18025226764 has 6 divisors (see below), whose sum is σ = 31544146844. Its totient is φ = 9012613380.

The previous prime is 18025226647. The next prime is 18025226773. The reversal of 18025226764 is 46762252081.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18025226764.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2253153342 + ... + 2253153349.

Almost surely, 2^18025226764 is an apocalyptic number.

It is an amenable number.

18025226764 is a deficient number, since it is larger than the sum of its proper divisors (13518920080).

18025226764 is a wasteful number, since it uses less digits than its factorization.

18025226764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506306695 (or 4506306693 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 18025226764 in words is "eighteen billion, twenty-five million, two hundred twenty-six thousand, seven hundred sixty-four".