18061700 has 18 divisors (see below), whose sum is σ = 39194106. Its totient is φ = 7224640.

The previous prime is 18061699. The next prime is 18061721. The reversal of 18061700 is 716081.

It can be written as a sum of positive squares in 3 ways, for example, as 5345344 + 12716356 = 2312^2 + 3566^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90209 + ... + 90408.

Almost surely, 2^18061700 is an apocalyptic number.

18061700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18061700 is an abundant number, since it is smaller than the sum of its proper divisors (21132406).

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

18061700 is a wasteful number, since it uses less digits than its factorization.

18061700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180631 (or 180624 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 18061700 is about 4249.9058813108. The cubic root of 18061700 is about 262.3732418989.

Adding to 18061700 its reverse (716081), we get a palindrome (18777781).

The spelling of 18061700 in words is "eighteen million, sixty-one thousand, seven hundred".