19887290084 has 24 divisors (see below), whose sum is σ = 34931530368. Its totient is φ = 9906886080.

The previous prime is 19887290083. The next prime is 19887290113. The reversal of 19887290084 is 48009278891.

It is not an unprimeable number, because it can be changed into a prime (19887290083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4593929 + ... + 4598255.

It is an arithmetic number, because the mean of its divisors is an integer number (1455480432).

Almost surely, 2^19887290084 is an apocalyptic number.

It is an amenable number.

19887290084 is a deficient number, since it is larger than the sum of its proper divisors (15044240284).

19887290084 is a wasteful number, since it uses less digits than its factorization.

19887290084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8315 (or 8313 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 56.

The spelling of 19887290084 in words is "nineteen billion, eight hundred eighty-seven million, two hundred ninety thousand, eighty-four".