19693559074 has 16 divisors (see below), whose sum is σ = 33975425088. Its totient is φ = 8386337232.

The previous prime is 19693559027. The next prime is 19693559099. The reversal of 19693559074 is 47095539691.

It is a happy number.

It is a super-2 number, since 2×19693559074² (a number of 21 digits) contains 22 as substring.

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, 4477684 + ... + 4482079.

It is an arithmetic number, because the mean of its divisors is an integer number (2123464068).

Almost surely, 2^19693559074 is an apocalyptic number.

19693559074 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19693559074 is a deficient number, since it is larger than the sum of its proper divisors (14281866014).

19693559074 is a wasteful number, since it uses less digits than its factorization.

19693559074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8959929.

The product of its (nonzero) digits is 9185400, while the sum is 58.

The spelling of 19693559074 in words is "nineteen billion, six hundred ninety-three million, five hundred fifty-nine thousand, seventy-four".