20500222211 has 8 divisors (see below), whose sum is σ = 23583984384. Its totient is φ = 17455249800.

The previous prime is 20500222201. The next prime is 20500222231. The reversal of 20500222211 is 11222200502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20500222211 is a prime.

It is a super-2 number, since 2×20500222211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20500222211.

It is not an unprimeable number, because it can be changed into a prime (20500222201) 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, 9696305 + ... + 9698418.

It is an arithmetic number, because the mean of its divisors is an integer number (2947998048).

Almost surely, 2^20500222211 is an apocalyptic number.

20500222211 is a deficient number, since it is larger than the sum of its proper divisors (3083762173).

20500222211 is a wasteful number, since it uses less digits than its factorization.

20500222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19394881.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 20500222211 its reverse (11222200502), we get a palindrome (31722422713).

The spelling of 20500222211 in words is "twenty billion, five hundred million, two hundred twenty-two thousand, two hundred eleven".