18898443 has 6 divisors (see below), whose sum is σ = 27297764. Its totient is φ = 12598956.

The previous prime is 18898423. The next prime is 18898463. The reversal of 18898443 is 34489881.

It is an interprime number because it is at equal distance from previous prime (18898423) and next prime (18898463).

It is not a de Polignac number, because 18898443 - 2¹² = 18894347 is a prime.

It is a super-2 number, since 2×18898443² = 714302295648498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18898403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1049905 + ... + 1049922.

Almost surely, 2^18898443 is an apocalyptic number.

18898443 is a deficient number, since it is larger than the sum of its proper divisors (8399321).

18898443 is a wasteful number, since it uses less digits than its factorization.

18898443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099833 (or 2099830 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 18898443 is about 4347.2339481560. The cubic root of 18898443 is about 266.3638856842.

The spelling of 18898443 in words is "eighteen million, eight hundred ninety-eight thousand, four hundred forty-three".