18898069 has 2 divisors, whose sum is σ = 18898070. Its totient is φ = 18898068.

The previous prime is 18898049. The next prime is 18898073. The reversal of 18898069 is 96089881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18879025 + 19044 = 4345^2 + 138^2 .

It is a cyclic number.

It is not a de Polignac number, because 18898069 - 2⁵ = 18898037 is a prime.

It is a super-2 number, since 2×18898069² = 714274023857522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

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, 9449034 + 9449035.

It is an arithmetic number, because the mean of its divisors is an integer number (9449035).

Almost surely, 2^18898069 is an apocalyptic number.

It is an amenable number.

18898069 is a deficient number, since it is larger than the sum of its proper divisors (1).

18898069 is an equidigital number, since it uses as much as digits as its factorization.

18898069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 18898069 is about 4347.1909320848. The cubic root of 18898069 is about 266.3621285597.

The spelling of 18898069 in words is "eighteen million, eight hundred ninety-eight thousand, sixty-nine".