19899417794 has 32 divisors (see below), whose sum is σ = 32164007040. Its totient is φ = 9210402432.

The previous prime is 19899417767. The next prime is 19899417823. The reversal of 19899417794 is 49771499891.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169454 + ... + 261750.

It is an arithmetic number, because the mean of its divisors is an integer number (1005125220).

Almost surely, 2^19899417794 is an apocalyptic number.

19899417794 is a deficient number, since it is larger than the sum of its proper divisors (12264589246).

19899417794 is a wasteful number, since it uses less digits than its factorization.

19899417794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92474.

The product of its digits is 41150592, while the sum is 68.

The spelling of 19899417794 in words is "nineteen billion, eight hundred ninety-nine million, four hundred seventeen thousand, seven hundred ninety-four".