19739255956 has 12 divisors (see below), whose sum is σ = 39478511968. Its totient is φ = 8459681112.

The previous prime is 19739255941. The next prime is 19739255957. The reversal of 19739255956 is 65955293791.

19739255956 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 19739255894 and 19739255903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19739255957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352486686 + ... + 352486741.

Almost surely, 2^19739255956 is an apocalyptic number.

It is an amenable number.

19739255956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19739255956 is a wasteful number, since it uses less digits than its factorization.

19739255956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704973438 (or 704973436 counting only the distinct ones).

The product of its digits is 22963500, while the sum is 61.

The spelling of 19739255956 in words is "nineteen billion, seven hundred thirty-nine million, two hundred fifty-five thousand, nine hundred fifty-six".