18850559 has 16 divisors (see below), whose sum is σ = 23600640. Its totient is φ = 14657760.

The previous prime is 18850549. The next prime is 18850567. The reversal of 18850559 is 95505881.

It is not a de Polignac number, because 18850559 - 2⁴ = 18850543 is a prime.

It is a super-2 number, since 2×18850559² = 710687149224962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18850549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3614 + ... + 7124.

It is an arithmetic number, because the mean of its divisors is an integer number (1475040).

Almost surely, 2^18850559 is an apocalyptic number.

18850559 is a deficient number, since it is larger than the sum of its proper divisors (4750081).

18850559 is a wasteful number, since it uses less digits than its factorization.

18850559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590.

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 18850559 is about 4341.7230450594. The cubic root of 18850559 is about 266.1387285852.

The spelling of 18850559 in words is "eighteen million, eight hundred fifty thousand, five hundred fifty-nine".