18489873963 has 16 divisors (see below), whose sum is σ = 26943555456. Its totient is φ = 11185487040.

The previous prime is 18489873953. The next prime is 18489873973. The reversal of 18489873963 is 36937898481.

It is an interprime number because it is at equal distance from previous prime (18489873953) and next prime (18489873973).

It is not a de Polignac number, because 18489873963 - 2⁴ = 18489873947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18489873894 and 18489873903.

It is not an unprimeable number, because it can be changed into a prime (18489873943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494106 + ... + 530207.

It is an arithmetic number, because the mean of its divisors is an integer number (1683972216).

Almost surely, 2^18489873963 is an apocalyptic number.

18489873963 is a deficient number, since it is larger than the sum of its proper divisors (8453681493).

18489873963 is a wasteful number, since it uses less digits than its factorization.

18489873963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024874.

The product of its digits is 62705664, while the sum is 66.

The spelling of 18489873963 in words is "eighteen billion, four hundred eighty-nine million, eight hundred seventy-three thousand, nine hundred sixty-three".