18950398 has 16 divisors (see below), whose sum is σ = 29515680. Its totient is φ = 9114336.

The previous prime is 18950389. The next prime is 18950431. The reversal of 18950398 is 89305981.

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, 22615 + ... + 23437.

It is an arithmetic number, because the mean of its divisors is an integer number (1844730).

Almost surely, 2^18950398 is an apocalyptic number.

18950398 is a deficient number, since it is larger than the sum of its proper divisors (10565282).

18950398 is a wasteful number, since it uses less digits than its factorization.

18950398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 18950398 is about 4353.2054856163. The cubic root of 18950398 is about 266.6077553892.

The spelling of 18950398 in words is "eighteen million, nine hundred fifty thousand, three hundred ninety-eight".