19772839696 has 10 divisors (see below), whose sum is σ = 38309876942. Its totient is φ = 9886419840.

The previous prime is 19772839679. The next prime is 19772839721. The reversal of 19772839696 is 69693827791.

It can be written as a sum of positive squares in only one way, i.e., 18474246400 + 1298593296 = 135920^2 + 36036^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617901225 + ... + 617901256.

Almost surely, 2^19772839696 is an apocalyptic number.

19772839696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19772839696 is a deficient number, since it is larger than the sum of its proper divisors (18537037246).

19772839696 is a wasteful number, since it uses less digits than its factorization.

19772839696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235802489 (or 1235802483 counting only the distinct ones).

The product of its digits is 61725888, while the sum is 67.

The spelling of 19772839696 in words is "nineteen billion, seven hundred seventy-two million, eight hundred thirty-nine thousand, six hundred ninety-six".