18990854 has 16 divisors (see below), whose sum is σ = 29338848. Its totient is φ = 9215232.

The previous prime is 18990841. The next prime is 18990869. The reversal of 18990854 is 45809981.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9359 + ... + 11205.

It is an arithmetic number, because the mean of its divisors is an integer number (1833678).

Almost surely, 2^18990854 is an apocalyptic number.

18990854 is a deficient number, since it is larger than the sum of its proper divisors (10347994).

18990854 is a wasteful number, since it uses less digits than its factorization.

18990854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 18990854 is about 4357.8496991062. The cubic root of 18990854 is about 266.7973418573.

The spelling of 18990854 in words is "eighteen million, nine hundred ninety thousand, eight hundred fifty-four".