18874433 has 2 divisors, whose sum is σ = 18874434. Its totient is φ = 18874432.

The previous prime is 18874423. The next prime is 18874439. The reversal of 18874433 is 33447881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14684224 + 4190209 = 3832^2 + 2047^2 .

It is a cyclic number.

It is not a de Polignac number, because 18874433 - 2⁴ = 18874417 is a prime.

It is not a weakly prime, because it can be changed into another prime (18874439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9437216 + 9437217.

It is an arithmetic number, because the mean of its divisors is an integer number (9437217).

Almost surely, 2^18874433 is an apocalyptic number.

It is an amenable number.

18874433 is a deficient number, since it is larger than the sum of its proper divisors (1).

18874433 is an equidigital number, since it uses as much as digits as its factorization.

18874433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 38.

The square root of 18874433 is about 4344.4715443883. The cubic root of 18874433 is about 266.2510349905.

The spelling of 18874433 in words is "eighteen million, eight hundred seventy-four thousand, four hundred thirty-three".