18228223608 has 64 divisors (see below), whose sum is σ = 52094016000. Its totient is φ = 5206726272.

The previous prime is 18228223577. The next prime is 18228223639. The reversal of 18228223608 is 80632282281.

It is an interprime number because it is at equal distance from previous prime (18228223577) and next prime (18228223639).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 18228223608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774478 + ... + 797666.

It is an arithmetic number, because the mean of its divisors is an integer number (813969000).

Almost surely, 2^18228223608 is an apocalyptic number.

It is an amenable number.

18228223608 is an abundant number, since it is smaller than the sum of its proper divisors (33865792392).

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

18228223608 is a wasteful number, since it uses less digits than its factorization.

18228223608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27884 (or 27880 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 18228223608 in words is "eighteen billion, two hundred twenty-eight million, two hundred twenty-three thousand, six hundred eight".