19561852036 has 12 divisors (see below), whose sum is σ = 34405268800. Its totient is φ = 9731775240.

The previous prime is 19561852031. The next prime is 19561852049. The reversal of 19561852036 is 63025816591.

It is not an unprimeable number, because it can be changed into a prime (19561852031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12286800 + ... + 12288391.

Almost surely, 2^19561852036 is an apocalyptic number.

It is an amenable number.

19561852036 is a deficient number, since it is larger than the sum of its proper divisors (14843416764).

19561852036 is a wasteful number, since it uses less digits than its factorization.

19561852036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24575394 (or 24575392 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 19561852036 in words is "nineteen billion, five hundred sixty-one million, eight hundred fifty-two thousand, thirty-six".