18500074 has 24 divisors (see below), whose sum is σ = 29374380. Its totient is φ = 8731008.

The previous prime is 18500071. The next prime is 18500081. The reversal of 18500074 is 47000581.

It can be written as a sum of positive squares in 6 ways, for example, as 14326225 + 4173849 = 3785^2 + 2043^2 .

It is not an unprimeable number, because it can be changed into a prime (18500071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207822 + ... + 207910.

Almost surely, 2^18500074 is an apocalyptic number.

18500074 is a deficient number, since it is larger than the sum of its proper divisors (10874306).

18500074 is an equidigital number, since it uses as much as digits as its factorization.

18500074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18500074 is about 4301.1712358380. The cubic root of 18500074 is about 264.4789762724.

It can be divided in two parts, 185000 and 74, that multiplied together give a square (13690000 = 3700²).

The spelling of 18500074 in words is "eighteen million, five hundred thousand, seventy-four".