16919313987 has 16 divisors (see below), whose sum is σ = 23028364800. Its totient is φ = 11047008000.

The previous prime is 16919313977. The next prime is 16919313989. The reversal of 16919313987 is 78931391961.

It is not a de Polignac number, because 16919313987 - 2⁶ = 16919313923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16919313989) 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, 230862 + ... + 295187.

It is an arithmetic number, because the mean of its divisors is an integer number (1439272800).

Almost surely, 2^16919313987 is an apocalyptic number.

16919313987 is a deficient number, since it is larger than the sum of its proper divisors (6109050813).

16919313987 is a wasteful number, since it uses less digits than its factorization.

16919313987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526274.

The product of its digits is 2204496, while the sum is 57.

The spelling of 16919313987 in words is "sixteen billion, nine hundred nineteen million, three hundred thirteen thousand, nine hundred eighty-seven".