18748049 has 2 divisors, whose sum is σ = 18748050. Its totient is φ = 18748048.

The previous prime is 18748033. The next prime is 18748073. The reversal of 18748049 is 94084781.

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., 13140625 + 5607424 = 3625^2 + 2368^2 .

It is a cyclic number.

It is not a de Polignac number, because 18748049 - 2⁴ = 18748033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18747997 and 18748015.

It is not a weakly prime, because it can be changed into another prime (18748349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9374024 + 9374025.

It is an arithmetic number, because the mean of its divisors is an integer number (9374025).

Almost surely, 2^18748049 is an apocalyptic number.

It is an amenable number.

18748049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18748049 is an equidigital number, since it uses as much as digits as its factorization.

18748049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 18748049 is about 4329.9017309865. The cubic root of 18748049 is about 265.6554275455.

The spelling of 18748049 in words is "eighteen million, seven hundred forty-eight thousand, forty-nine".