18754889 has 4 divisors (see below), whose sum is σ = 18891924. Its totient is φ = 18617856.

The previous prime is 18754849. The next prime is 18754903. The reversal of 18754889 is 98845781.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7812025 + 10942864 = 2795^2 + 3308^2 .

It is a cyclic number.

It is not a de Polignac number, because 18754889 - 2¹² = 18750793 is a prime.

It is a super-2 number, since 2×18754889² = 703491722804642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18754829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68312 + ... + 68585.

It is an arithmetic number, because the mean of its divisors is an integer number (4722981).

Almost surely, 2^18754889 is an apocalyptic number.

It is an amenable number.

18754889 is a deficient number, since it is larger than the sum of its proper divisors (137035).

18754889 is a wasteful number, since it uses less digits than its factorization.

18754889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137034.

The product of its digits is 645120, while the sum is 50.

The square root of 18754889 is about 4330.6915152202. The cubic root of 18754889 is about 265.6877306790.

The spelling of 18754889 in words is "eighteen million, seven hundred fifty-four thousand, eight hundred eighty-nine".