18987073235 has 16 divisors (see below), whose sum is σ = 24540122880. Its totient is φ = 14019519360.

The previous prime is 18987073213. The next prime is 18987073241. The reversal of 18987073235 is 53237078981.

It is not a de Polignac number, because 18987073235 - 2¹⁸ = 18986811091 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 831065 + ... + 853605.

It is an arithmetic number, because the mean of its divisors is an integer number (1533757680).

Almost surely, 2^18987073235 is an apocalyptic number.

18987073235 is a deficient number, since it is larger than the sum of its proper divisors (5553049645).

18987073235 is a wasteful number, since it uses less digits than its factorization.

18987073235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35518.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 18987073235 in words is "eighteen billion, nine hundred eighty-seven million, seventy-three thousand, two hundred thirty-five".