18989254 has 4 divisors (see below), whose sum is σ = 28483884. Its totient is φ = 9494626.

The previous prime is 18989249. The next prime is 18989291. The reversal of 18989254 is 45298981.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4747312 + ... + 4747315.

It is an arithmetic number, because the mean of its divisors is an integer number (7120971).

Almost surely, 2^18989254 is an apocalyptic number.

18989254 is a deficient number, since it is larger than the sum of its proper divisors (9494630).

18989254 is an equidigital number, since it uses as much as digits as its factorization.

18989254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9494629.

The product of its digits is 207360, while the sum is 46.

The square root of 18989254 is about 4357.6661184630. Note that the first 3 decimals coincide. The cubic root of 18989254 is about 266.7898489919.

The spelling of 18989254 in words is "eighteen million, nine hundred eighty-nine thousand, two hundred fifty-four".