18948029 has 2 divisors, whose sum is σ = 18948030. Its totient is φ = 18948028.

The previous prime is 18948023. The next prime is 18948031. The reversal of 18948029 is 92084981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10956100 + 7991929 = 3310^2 + 2827^2 .

It is an emirp because it is prime and its reverse (92084981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18948029 - 2²⁴ = 2170813 is a prime.

It is a Sophie Germain prime.

Together with 18948031, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18948023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9474014 + 9474015.

It is an arithmetic number, because the mean of its divisors is an integer number (9474015).

Almost surely, 2^18948029 is an apocalyptic number.

It is an amenable number.

18948029 is a deficient number, since it is larger than the sum of its proper divisors (1).

18948029 is an equidigital number, since it uses as much as digits as its factorization.

18948029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 18948029 is about 4352.9333787689. The cubic root of 18948029 is about 266.5966453307.

The spelling of 18948029 in words is "eighteen million, nine hundred forty-eight thousand, twenty-nine".