18196180 has 12 divisors (see below), whose sum is σ = 38212020. Its totient is φ = 7278464.

The previous prime is 18196141. The next prime is 18196183. The reversal of 18196180 is 8169181.

It can be written as a sum of positive squares in 2 ways, for example, as 13927824 + 4268356 = 3732^2 + 2066^2 .

It is a super-2 number, since 2×18196180² = 662201933184800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18196183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454885 + ... + 454924.

It is an arithmetic number, because the mean of its divisors is an integer number (3184335).

Almost surely, 2^18196180 is an apocalyptic number.

18196180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18196180 is an abundant number, since it is smaller than the sum of its proper divisors (20015840).

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

18196180 is a wasteful number, since it uses less digits than its factorization.

18196180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909818 (or 909816 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 18196180 is about 4265.6980671398. The cubic root of 18196180 is about 263.0228068913.

The spelling of 18196180 in words is "eighteen million, one hundred ninety-six thousand, one hundred eighty".