19957112606 has 8 divisors (see below), whose sum is σ = 30901335744. Its totient is φ = 9656667360.

The previous prime is 19957112587. The next prime is 19957112611. The reversal of 19957112606 is 60621175991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×19957112606² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160944395 + ... + 160944518.

It is an arithmetic number, because the mean of its divisors is an integer number (3862666968).

Almost surely, 2^19957112606 is an apocalyptic number.

19957112606 is a deficient number, since it is larger than the sum of its proper divisors (10944223138).

19957112606 is a wasteful number, since it uses less digits than its factorization.

19957112606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321888946.

The product of its (nonzero) digits is 204120, while the sum is 47.

The spelling of 19957112606 in words is "nineteen billion, nine hundred fifty-seven million, one hundred twelve thousand, six hundred six".