18258226220 has 48 divisors (see below), whose sum is σ = 41317066560. Its totient is φ = 6737354496.

The previous prime is 18258226177. The next prime is 18258226223. The reversal of 18258226220 is 2262285281.

It is not an unprimeable number, because it can be changed into a prime (18258226223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419441 + ... + 460919.

It is an arithmetic number, because the mean of its divisors is an integer number (860772220).

Almost surely, 2^18258226220 is an apocalyptic number.

18258226220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18258226220 is an abundant number, since it is smaller than the sum of its proper divisors (23058840340).

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

18258226220 is a wasteful number, since it uses less digits than its factorization.

18258226220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43194 (or 43192 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

It can be divided in two parts, 182582 and 26220, that added together give a palindrome (208802).

The spelling of 18258226220 in words is "eighteen billion, two hundred fifty-eight million, two hundred twenty-six thousand, two hundred twenty".