19557685573942 has 32 divisors (see below), whose sum is σ = 29411334358560. Its totient is φ = 9753951467520.

The previous prime is 19557685573931. The next prime is 19557685573963. The reversal of 19557685573942 is 24937558675591.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6331395534 + ... + 6331398622.

It is an arithmetic number, because the mean of its divisors is an integer number (919104198705).

Almost surely, 2^{19557685573942} is an apocalyptic number.

19557685573942 is a deficient number, since it is larger than the sum of its proper divisors (9853648784618).

19557685573942 is a wasteful number, since it uses less digits than its factorization.

19557685573942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7936.

The product of its digits is 2857680000, while the sum is 76.

The spelling of 19557685573942 in words is "nineteen trillion, five hundred fifty-seven billion, six hundred eighty-five million, five hundred seventy-three thousand, nine hundred forty-two".