19992827986 has 8 divisors (see below), whose sum is σ = 30083846220. Its totient is φ = 9964879248.

The previous prime is 19992827971. The next prime is 19992827999. The reversal of 19992827986 is 68972829991.

It can be written as a sum of positive squares in 2 ways, for example, as 19992546025 + 281961 = 141395^2 + 531^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15766581 + ... + 15767848.

Almost surely, 2^19992827986 is an apocalyptic number.

19992827986 is a deficient number, since it is larger than the sum of its proper divisors (10091018234).

19992827986 is a wasteful number, since it uses less digits than its factorization.

19992827986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31534748.

The product of its digits is 70543872, while the sum is 70.

The spelling of 19992827986 in words is "nineteen billion, nine hundred ninety-two million, eight hundred twenty-seven thousand, nine hundred eighty-six".