19845856930 has 32 divisors (see below), whose sum is σ = 36437796864. Its totient is φ = 7780905216.

The previous prime is 19845856879. The next prime is 19845857021. The reversal of 19845856930 is 3965854891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11274 + ... + 199546.

It is an arithmetic number, because the mean of its divisors is an integer number (1138681152).

Almost surely, 2^19845856930 is an apocalyptic number.

19845856930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19845856930 is a deficient number, since it is larger than the sum of its proper divisors (16591939934).

19845856930 is a wasteful number, since it uses less digits than its factorization.

19845856930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188490.

The product of its (nonzero) digits is 9331200, while the sum is 58.

The spelling of 19845856930 in words is "nineteen billion, eight hundred forty-five million, eight hundred fifty-six thousand, nine hundred thirty".