18460989 has 24 divisors (see below), whose sum is σ = 28679040. Its totient is φ = 11406528.

The previous prime is 18460987. The next prime is 18460991. The reversal of 18460989 is 98906481.

It is an interprime number because it is at equal distance from previous prime (18460987) and next prime (18460991).

It is not a de Polignac number, because 18460989 - 2¹ = 18460987 is a prime.

It is a super-2 number, since 2×18460989² = 681616229716242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18460987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6889 + ... + 9185.

It is an arithmetic number, because the mean of its divisors is an integer number (1194960).

Almost surely, 2^18460989 is an apocalyptic number.

18460989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18460989 is the 2297-th nonagonal number.

It is an amenable number.

18460989 is a deficient number, since it is larger than the sum of its proper divisors (10218051).

18460989 is a wasteful number, since it uses less digits than its factorization.

18460989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369 (or 2366 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 18460989 is about 4296.6253036540. The cubic root of 18460989 is about 264.2925905477.

The spelling of 18460989 in words is "eighteen million, four hundred sixty thousand, nine hundred eighty-nine".