18898049 has 2 divisors, whose sum is σ = 18898050. Its totient is φ = 18898048.

The previous prime is 18898039. The next prime is 18898069. The reversal of 18898049 is 94089881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 5793649 = 3620^2 + 2407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18898049 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18897994 and 18898012.

It is not a weakly prime, because it can be changed into another prime (18898039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9449024 + 9449025.

It is an arithmetic number, because the mean of its divisors is an integer number (9449025).

Almost surely, 2^18898049 is an apocalyptic number.

It is an amenable number.

18898049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18898049 is an equidigital number, since it uses as much as digits as its factorization.

18898049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 18898049 is about 4347.1886317481. The cubic root of 18898049 is about 266.3620345952.

The spelling of 18898049 in words is "eighteen million, eight hundred ninety-eight thousand, forty-nine".