18899033 has 2 divisors, whose sum is σ = 18899034. Its totient is φ = 18899032.

The previous prime is 18899021. The next prime is 18899047. The reversal of 18899033 is 33099881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14684224 + 4214809 = 3832^2 + 2053^2 .

It is a cyclic number.

It is not a de Polignac number, because 18899033 - 2⁶ = 18898969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18899003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9449516 + 9449517.

It is an arithmetic number, because the mean of its divisors is an integer number (9449517).

Almost surely, 2^18899033 is an apocalyptic number.

It is an amenable number.

18899033 is a deficient number, since it is larger than the sum of its proper divisors (1).

18899033 is an equidigital number, since it uses as much as digits as its factorization.

18899033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 18899033 is about 4347.3018068683. The cubic root of 18899033 is about 266.3666575714.

The spelling of 18899033 in words is "eighteen million, eight hundred ninety-nine thousand, thirty-three".