18749629 has 2 divisors, whose sum is σ = 18749630. Its totient is φ = 18749628.

The previous prime is 18749611. The next prime is 18749641. The reversal of 18749629 is 92694781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18748900 + 729 = 4330^2 + 27^2 .

It is a cyclic number.

It is not a de Polignac number, because 18749629 - 2⁵ = 18749597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18749659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9374814 + 9374815.

It is an arithmetic number, because the mean of its divisors is an integer number (9374815).

Almost surely, 2^18749629 is an apocalyptic number.

It is an amenable number.

18749629 is a deficient number, since it is larger than the sum of its proper divisors (1).

18749629 is an equidigital number, since it uses as much as digits as its factorization.

18749629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 18749629 is about 4330.0841793203. The cubic root of 18749629 is about 265.6628900782.

The spelling of 18749629 in words is "eighteen million, seven hundred forty-nine thousand, six hundred twenty-nine".