18452218100 has 36 divisors (see below), whose sum is σ = 41017939788. Its totient is φ = 7200864000.

The previous prime is 18452218069. The next prime is 18452218117. The reversal of 18452218100 is 181225481.

It can be written as a sum of positive squares in 6 ways, for example, as 6498294544 + 11953923556 = 80612^2 + 109334^2 .

It is a super-2 number, since 2×18452218100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2246171 + ... + 2254370.

Almost surely, 2^18452218100 is an apocalyptic number.

18452218100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18452218100 is an abundant number, since it is smaller than the sum of its proper divisors (22565721688).

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

18452218100 is a wasteful number, since it uses less digits than its factorization.

18452218100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500596 (or 4500589 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 32.

The spelling of 18452218100 in words is "eighteen billion, four hundred fifty-two million, two hundred eighteen thousand, one hundred".