18262990 has 24 divisors (see below), whose sum is σ = 34701480. Its totient is φ = 6919344.

The previous prime is 18262949. The next prime is 18262991. The reversal of 18262990 is 9926281.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18262991) 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, 1081 + ... + 6139.

It is an arithmetic number, because the mean of its divisors is an integer number (1445895).

Almost surely, 2^18262990 is an apocalyptic number.

18262990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18262990 is a deficient number, since it is larger than the sum of its proper divisors (16438490).

18262990 is a wasteful number, since it uses less digits than its factorization.

18262990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5104 (or 5085 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 18262990 is about 4273.5219667155. The cubic root of 18262990 is about 263.3443229226.

The spelling of 18262990 in words is "eighteen million, two hundred sixty-two thousand, nine hundred ninety".