18884090 has 8 divisors (see below), whose sum is σ = 33991380. Its totient is φ = 7553632.

The previous prime is 18884051. The next prime is 18884101. The reversal of 18884090 is 9048881.

It can be written as a sum of positive squares in 2 ways, for example, as 18292729 + 591361 = 4277^2 + 769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944195 + ... + 944214.

Almost surely, 2^18884090 is an apocalyptic number.

18884090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18884090 is a deficient number, since it is larger than the sum of its proper divisors (15107290).

18884090 is a wasteful number, since it uses less digits than its factorization.

18884090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888416.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 18884090 is about 4345.5828147672. The cubic root of 18884090 is about 266.2964358750.

The spelling of 18884090 in words is "eighteen million, eight hundred eighty-four thousand, ninety".