19853958066 has 16 divisors (see below), whose sum is σ = 39970884288. Its totient is φ = 6574158000.

The previous prime is 19853958037. The next prime is 19853958071. The reversal of 19853958066 is 66085935891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10956025 + ... + 10957836.

It is an arithmetic number, because the mean of its divisors is an integer number (2498180268).

Almost surely, 2^19853958066 is an apocalyptic number.

19853958066 is an abundant number, since it is smaller than the sum of its proper divisors (20116926222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19853958066 is a wasteful number, since it uses less digits than its factorization.

19853958066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21914017.

The product of its (nonzero) digits is 13996800, while the sum is 60.

The spelling of 19853958066 in words is "nineteen billion, eight hundred fifty-three million, nine hundred fifty-eight thousand, sixty-six".