20019612917 has 8 divisors (see below), whose sum is σ = 20449344000. Its totient is φ = 19590039504.

The previous prime is 20019612911. The next prime is 20019612959. The reversal of 20019612917 is 71921691002.

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

It is a cyclic number.

It is not a de Polignac number, because 20019612917 - 2⁸ = 20019612661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019612911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237959 + ... + 310907.

It is an arithmetic number, because the mean of its divisors is an integer number (2556168000).

Almost surely, 2^20019612917 is an apocalyptic number.

It is an amenable number.

20019612917 is a deficient number, since it is larger than the sum of its proper divisors (429731083).

20019612917 is an equidigital number, since it uses as much as digits as its factorization.

20019612917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78835.

The product of its (nonzero) digits is 13608, while the sum is 38.

The spelling of 20019612917 in words is "twenty billion, nineteen million, six hundred twelve thousand, nine hundred seventeen".