19539372652 has 6 divisors (see below), whose sum is σ = 34193902148. Its totient is φ = 9769686324.

The previous prime is 19539372623. The next prime is 19539372673. The reversal of 19539372652 is 25627393591.

It is a self number, because there is not a number n which added to its sum of digits gives 19539372652.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2442421578 + ... + 2442421585.

Almost surely, 2^19539372652 is an apocalyptic number.

It is an amenable number.

19539372652 is a deficient number, since it is larger than the sum of its proper divisors (14654529496).

19539372652 is a wasteful number, since it uses less digits than its factorization.

19539372652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884843167 (or 4884843165 counting only the distinct ones).

The product of its digits is 3061800, while the sum is 52.

The spelling of 19539372652 in words is "nineteen billion, five hundred thirty-nine million, three hundred seventy-two thousand, six hundred fifty-two".