18126253 has 4 divisors (see below), whose sum is σ = 18137020. Its totient is φ = 18115488.

The previous prime is 18126221. The next prime is 18126271. The reversal of 18126253 is 35262181.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10738729 + 7387524 = 3277^2 + 2718^2 .

It is a cyclic number.

It is not a de Polignac number, because 18126253 - 2⁵ = 18126221 is a prime.

It is a super-2 number, since 2×18126253² = 657122095640018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18126203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2250 + ... + 6427.

It is an arithmetic number, because the mean of its divisors is an integer number (4534255).

Almost surely, 2^18126253 is an apocalyptic number.

It is an amenable number.

18126253 is a deficient number, since it is larger than the sum of its proper divisors (10767).

18126253 is an equidigital number, since it uses as much as digits as its factorization.

18126253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10766.

The product of its digits is 2880, while the sum is 28.

The square root of 18126253 is about 4257.4937463254. The cubic root of 18126253 is about 262.6854465846.

The spelling of 18126253 in words is "eighteen million, one hundred twenty-six thousand, two hundred fifty-three".