19894274908 has 24 divisors (see below), whose sum is σ = 35657444592. Its totient is φ = 9706859904.

The previous prime is 19894274903. The next prime is 19894274909. The reversal of 19894274908 is 80947249891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19894274903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135966 + ... + 241402.

It is an arithmetic number, because the mean of its divisors is an integer number (1485726858).

Almost surely, 2^19894274908 is an apocalyptic number.

It is an amenable number.

19894274908 is a deficient number, since it is larger than the sum of its proper divisors (15763169684).

19894274908 is a wasteful number, since it uses less digits than its factorization.

19894274908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106581 (or 106579 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 19894274908 in words is "nineteen billion, eight hundred ninety-four million, two hundred seventy-four thousand, nine hundred eight".