18525982 has 4 divisors (see below), whose sum is σ = 27788976. Its totient is φ = 9262990.

The previous prime is 18525961. The next prime is 18525989. The reversal of 18525982 is 28952581.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18525989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4631494 + ... + 4631497.

It is an arithmetic number, because the mean of its divisors is an integer number (6947244).

Almost surely, 2^18525982 is an apocalyptic number.

18525982 is a deficient number, since it is larger than the sum of its proper divisors (9262994).

18525982 is an equidigital number, since it uses as much as digits as its factorization.

18525982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9262993.

The product of its digits is 57600, while the sum is 40.

The square root of 18525982 is about 4304.1819199472. The cubic root of 18525982 is about 264.6023798359.

The spelling of 18525982 in words is "eighteen million, five hundred twenty-five thousand, nine hundred eighty-two".