18126469 has 4 divisors (see below), whose sum is σ = 18568620. Its totient is φ = 17684320.

The previous prime is 18126439. The next prime is 18126481. The reversal of 18126469 is 96462181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4708900 + 13417569 = 2170^2 + 3663^2 .

It is a cyclic number.

It is not a de Polignac number, because 18126469 - 2⁷ = 18126341 is a prime.

It is a super-2 number, since 2×18126469² = 657137756815922, 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 (18126419) 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, 221014 + ... + 221095.

It is an arithmetic number, because the mean of its divisors is an integer number (4642155).

Almost surely, 2^18126469 is an apocalyptic number.

It is an amenable number.

18126469 is a deficient number, since it is larger than the sum of its proper divisors (442151).

18126469 is an equidigital number, since it uses as much as digits as its factorization.

18126469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442150.

The product of its digits is 20736, while the sum is 37.

The square root of 18126469 is about 4257.5191132865. The cubic root of 18126469 is about 262.6864900036.

It can be divided in two parts, 1812 and 6469, that added together give a square (8281 = 91²).

The spelling of 18126469 in words is "eighteen million, one hundred twenty-six thousand, four hundred sixty-nine".