19899627087 has 16 divisors (see below), whose sum is σ = 27133977600. Its totient is φ = 12966610272.

The previous prime is 19899627047. The next prime is 19899627091. The reversal of 19899627087 is 78072699891.

It is not a de Polignac number, because 19899627087 - 2¹² = 19899622991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19899627047) 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, 9789 + ... + 199737.

It is an arithmetic number, because the mean of its divisors is an integer number (1695873600).

Almost surely, 2^19899627087 is an apocalyptic number.

19899627087 is a deficient number, since it is larger than the sum of its proper divisors (7234350513).

19899627087 is a wasteful number, since it uses less digits than its factorization.

19899627087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190742.

The product of its (nonzero) digits is 27433728, while the sum is 66.

The spelling of 19899627087 in words is "nineteen billion, eight hundred ninety-nine million, six hundred twenty-seven thousand, eighty-seven".