18898073 has 2 divisors, whose sum is σ = 18898074. Its totient is φ = 18898072.

The previous prime is 18898069. The next prime is 18898079. The reversal of 18898073 is 37089881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17330569 + 1567504 = 4163^2 + 1252^2 .

It is a cyclic number.

It is not a de Polignac number, because 18898073 - 2² = 18898069 is a prime.

It is a super-2 number, since 2×18898073² = 714274326226658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18898079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9449036 + 9449037.

It is an arithmetic number, because the mean of its divisors is an integer number (9449037).

Almost surely, 2^18898073 is an apocalyptic number.

It is an amenable number.

18898073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18898073 is an equidigital number, since it uses as much as digits as its factorization.

18898073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 18898073 is about 4347.1913921519. The cubic root of 18898073 is about 266.3621473526.

The spelling of 18898073 in words is "eighteen million, eight hundred ninety-eight thousand, seventy-three".