18600090 has 16 divisors (see below), whose sum is σ = 44640288. Its totient is φ = 4960016.

The previous prime is 18600089. The next prime is 18600097. The reversal of 18600090 is 9000681.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18600090.

It is not an unprimeable number, because it can be changed into a prime (18600097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309972 + ... + 310031.

It is an arithmetic number, because the mean of its divisors is an integer number (2790018).

Almost surely, 2^18600090 is an apocalyptic number.

18600090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18600090 is an abundant number, since it is smaller than the sum of its proper divisors (26040198).

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

18600090 is a wasteful number, since it uses less digits than its factorization.

18600090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620013.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 18600090 is about 4312.7821646821. The cubic root of 18600090 is about 264.9547329823.

The spelling of 18600090 in words is "eighteen million, six hundred thousand, ninety".