18026422412501 has 4 divisors (see below), whose sum is σ = 18027041885004. Its totient is φ = 18025802940000.

The previous prime is 18026422412477. The next prime is 18026422412567. The reversal of 18026422412501 is 10521422462081.

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 8121365739601 + 9905056672900 = 2849801^2 + 3147230^2 .

It is a cyclic number.

It is not a de Polignac number, because 18026422412501 - 2⁴² = 13628375901397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18026422417501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309692600 + ... + 309750801.

It is an arithmetic number, because the mean of its divisors is an integer number (4506760471251).

Almost surely, 2^{18026422412501} is an apocalyptic number.

It is an amenable number.

18026422412501 is a deficient number, since it is larger than the sum of its proper divisors (619472503).

18026422412501 is an equidigital number, since it uses as much as digits as its factorization.

18026422412501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619472502.

The product of its (nonzero) digits is 61440, while the sum is 38.

Adding to 18026422412501 its reverse (10521422462081), we get a palindrome (28547844874582).

The spelling of 18026422412501 in words is "eighteen trillion, twenty-six billion, four hundred twenty-two million, four hundred twelve thousand, five hundred one".