18051233 has 2 divisors, whose sum is σ = 18051234. Its totient is φ = 18051232.

The previous prime is 18051223. The next prime is 18051277. The reversal of 18051233 is 33215081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10804369 + 7246864 = 3287^2 + 2692^2 .

It is a cyclic number.

It is not a de Polignac number, because 18051233 - 2¹⁶ = 17985697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18051199 and 18051208.

It is not a weakly prime, because it can be changed into another prime (18051223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9025616 + 9025617.

It is an arithmetic number, because the mean of its divisors is an integer number (9025617).

Almost surely, 2^18051233 is an apocalyptic number.

It is an amenable number.

18051233 is a deficient number, since it is larger than the sum of its proper divisors (1).

18051233 is an equidigital number, since it uses as much as digits as its factorization.

18051233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 18051233 is about 4248.6742638145. The cubic root of 18051233 is about 262.3225491551.

The spelling of 18051233 in words is "eighteen million, fifty-one thousand, two hundred thirty-three".