20193872617 has 16 divisors (see below), whose sum is σ = 21019328512. Its totient is φ = 19384868160.

The previous prime is 20193872609. The next prime is 20193872627. The reversal of 20193872617 is 71627839102.

It is a cyclic number.

It is not a de Polignac number, because 20193872617 - 2³ = 20193872609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20193872627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 838648 + ... + 862390.

It is an arithmetic number, because the mean of its divisors is an integer number (1313708032).

Almost surely, 2^20193872617 is an apocalyptic number.

It is an amenable number.

20193872617 is a deficient number, since it is larger than the sum of its proper divisors (825455895).

20193872617 is a wasteful number, since it uses less digits than its factorization.

20193872617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24088.

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 20193872617 in words is "twenty billion, one hundred ninety-three million, eight hundred seventy-two thousand, six hundred seventeen".