18749933 has 2 divisors, whose sum is σ = 18749934. Its totient is φ = 18749932.

The previous prime is 18749917. The next prime is 18749959. The reversal of 18749933 is 33994781.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18130564 + 619369 = 4258^2 + 787^2 .

It is a cyclic number.

It is not a de Polignac number, because 18749933 - 2⁴ = 18749917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18749993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9374966 + 9374967.

It is an arithmetic number, because the mean of its divisors is an integer number (9374967).

Almost surely, 2^18749933 is an apocalyptic number.

It is an amenable number.

18749933 is a deficient number, since it is larger than the sum of its proper divisors (1).

18749933 is an equidigital number, since it uses as much as digits as its factorization.

18749933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 18749933 is about 4330.1192824217. The cubic root of 18749933 is about 265.6643258592.

The spelling of 18749933 in words is "eighteen million, seven hundred forty-nine thousand, nine hundred thirty-three".