18252490 has 32 divisors (see below), whose sum is σ = 34320384. Its totient is φ = 6981120.

The previous prime is 18252473. The next prime is 18252491. The reversal of 18252490 is 9425281.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (18252491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29767 + ... + 30373.

It is an arithmetic number, because the mean of its divisors is an integer number (1072512).

Almost surely, 2^18252490 is an apocalyptic number.

18252490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18252490 is a deficient number, since it is larger than the sum of its proper divisors (16067894).

18252490 is a wasteful number, since it uses less digits than its factorization.

18252490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18252490 is about 4272.2932951753. The cubic root of 18252490 is about 263.2938447793.

The spelling of 18252490 in words is "eighteen million, two hundred fifty-two thousand, four hundred ninety".