19637539828 has 12 divisors (see below), whose sum is σ = 34849719072. Its totient is φ = 9680477240.

The previous prime is 19637539811. The next prime is 19637539841. The reversal of 19637539828 is 82893573691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34572850 + ... + 34573417.

It is an arithmetic number, because the mean of its divisors is an integer number (2904143256).

Almost surely, 2^19637539828 is an apocalyptic number.

It is an amenable number.

19637539828 is a deficient number, since it is larger than the sum of its proper divisors (15212179244).

19637539828 is a wasteful number, since it uses less digits than its factorization.

19637539828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69146342 (or 69146340 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 61.

The spelling of 19637539828 in words is "nineteen billion, six hundred thirty-seven million, five hundred thirty-nine thousand, eight hundred twenty-eight".