19953198632 has 8 divisors (see below), whose sum is σ = 37412247450. Its totient is φ = 9976599312.

The previous prime is 19953198527. The next prime is 19953198641. The reversal of 19953198632 is 23689135991.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10769043076 + 9184155556 = 103774^2 + 95834^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1247074907 + ... + 1247074922.

Almost surely, 2^19953198632 is an apocalyptic number.

It is an amenable number.

19953198632 is a deficient number, since it is larger than the sum of its proper divisors (17459048818).

19953198632 is a wasteful number, since it uses less digits than its factorization.

19953198632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494149835 (or 2494149831 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 56.

The spelling of 19953198632 in words is "nineteen billion, nine hundred fifty-three million, one hundred ninety-eight thousand, six hundred thirty-two".