18026121 has 4 divisors (see below), whose sum is σ = 24034832. Its totient is φ = 12017412.

The previous prime is 18026087. The next prime is 18026123. The reversal of 18026121 is 12162081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18026121 - 2¹³ = 18017929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18026123) 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, 3004351 + ... + 3004356.

It is an arithmetic number, because the mean of its divisors is an integer number (6008708).

Almost surely, 2^18026121 is an apocalyptic number.

It is an amenable number.

18026121 is a deficient number, since it is larger than the sum of its proper divisors (6008711).

18026121 is an equidigital number, since it uses as much as digits as its factorization.

18026121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008710.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 18026121 is about 4245.7179604868. The cubic root of 18026121 is about 262.2008492334.

The spelling of 18026121 in words is "eighteen million, twenty-six thousand, one hundred twenty-one".