18252022 has 4 divisors (see below), whose sum is σ = 27378036. Its totient is φ = 9126010.

The previous prime is 18252001. The next prime is 18252023. The reversal of 18252022 is 22025281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22025281 = 47 ⋅468623.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 18251984 and 18252002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18252023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4563004 + ... + 4563007.

It is an arithmetic number, because the mean of its divisors is an integer number (6844509).

Almost surely, 2^18252022 is an apocalyptic number.

18252022 is a deficient number, since it is larger than the sum of its proper divisors (9126014).

18252022 is an equidigital number, since it uses as much as digits as its factorization.

18252022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126013.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 18252022 is about 4272.2385233037. The cubic root of 18252022 is about 263.2915944457.

The spelling of 18252022 in words is "eighteen million, two hundred fifty-two thousand, twenty-two".