20122215017 has 4 divisors (see below), whose sum is σ = 20145641040. Its totient is φ = 20098788996.

The previous prime is 20122214977. The next prime is 20122215049. The reversal of 20122215017 is 71051222102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122215017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122214983 and 20122215001.

It is not an unprimeable number, because it can be changed into a prime (20122215067) 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, 11711723 + ... + 11713440.

It is an arithmetic number, because the mean of its divisors is an integer number (5036410260).

Almost surely, 2^20122215017 is an apocalyptic number.

It is an amenable number.

20122215017 is a deficient number, since it is larger than the sum of its proper divisors (23426023).

20122215017 is an equidigital number, since it uses as much as digits as its factorization.

20122215017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23426022.

The product of its (nonzero) digits is 560, while the sum is 23.

Adding to 20122215017 its reverse (71051222102), we get a palindrome (91173437119).

The spelling of 20122215017 in words is "twenty billion, one hundred twenty-two million, two hundred fifteen thousand, seventeen".