18499963 has 12 divisors (see below), whose sum is σ = 19768512. Its totient is φ = 17282160.

The previous prime is 18499931. The next prime is 18500017. The reversal of 18499963 is 36999481.

It is not a de Polignac number, because 18499963 - 2⁵ = 18499931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18499903) 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 11 ways as a sum of consecutive naturals, for example, 145606 + ... + 145732.

It is an arithmetic number, because the mean of its divisors is an integer number (1647376).

Almost surely, 2^18499963 is an apocalyptic number.

18499963 is a deficient number, since it is larger than the sum of its proper divisors (1268549).

18499963 is an equidigital number, since it uses as much as digits as its factorization.

18499963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 195 counting only the distinct ones).

The product of its digits is 419904, while the sum is 49.

The square root of 18499963 is about 4301.1583323565. The cubic root of 18499963 is about 264.4784473155.

The spelling of 18499963 in words is "eighteen million, four hundred ninety-nine thousand, nine hundred sixty-three".