18280982 has 4 divisors (see below), whose sum is σ = 27421476. Its totient is φ = 9140490.

The previous prime is 18280981. The next prime is 18280993. The reversal of 18280982 is 28908281.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18280981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4570244 + ... + 4570247.

It is an arithmetic number, because the mean of its divisors is an integer number (6855369).

Almost surely, 2^18280982 is an apocalyptic number.

18280982 is a deficient number, since it is larger than the sum of its proper divisors (9140494).

18280982 is an equidigital number, since it uses as much as digits as its factorization.

18280982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9140493.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 18280982 is about 4275.6265038003. The cubic root of 18280982 is about 263.4307734615.

The spelling of 18280982 in words is "eighteen million, two hundred eighty thousand, nine hundred eighty-two".