19870900983 has 6 divisors (see below), whose sum is σ = 28702412544. Its totient is φ = 13247267316.

The previous prime is 19870900981. The next prime is 19870900999. The reversal of 19870900983 is 38900907891.

It is not a de Polignac number, because 19870900983 - 2¹ = 19870900981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19870900981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1103938935 + ... + 1103938952.

It is an arithmetic number, because the mean of its divisors is an integer number (4783735424).

Almost surely, 2^19870900983 is an apocalyptic number.

19870900983 is a deficient number, since it is larger than the sum of its proper divisors (8831511561).

19870900983 is a wasteful number, since it uses less digits than its factorization.

19870900983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207877893 (or 2207877890 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The spelling of 19870900983 in words is "nineteen billion, eight hundred seventy million, nine hundred thousand, nine hundred eighty-three".