18026990 has 8 divisors (see below), whose sum is σ = 32448600. Its totient is φ = 7210792.

The previous prime is 18026959. The next prime is 18027011. The reversal of 18026990 is 9962081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18026990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901340 + ... + 901359.

It is an arithmetic number, because the mean of its divisors is an integer number (4056075).

Almost surely, 2^18026990 is an apocalyptic number.

18026990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18026990 is a deficient number, since it is larger than the sum of its proper divisors (14421610).

18026990 is a wasteful number, since it uses less digits than its factorization.

18026990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802706.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 18026990 is about 4245.8202976575. The cubic root of 18026990 is about 262.2050625428.

The spelling of 18026990 in words is "eighteen million, twenty-six thousand, nine hundred ninety".