20172000222 has 24 divisors (see below), whose sum is σ = 47679273720. Its totient is φ = 6112727280.

The previous prime is 20172000221. The next prime is 20172000239. The reversal of 20172000222 is 22200027102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20172000195 and 20172000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20172000221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50939197 + ... + 50939592.

It is an arithmetic number, because the mean of its divisors is an integer number (1986636405).

Almost surely, 2^20172000222 is an apocalyptic number.

20172000222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20172000222 is an abundant number, since it is smaller than the sum of its proper divisors (27507273498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20172000222 is a wasteful number, since it uses less digits than its factorization.

20172000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101878808 (or 101878805 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

Adding to 20172000222 its reverse (22200027102), we get a palindrome (42372027324).

The spelling of 20172000222 in words is "twenty billion, one hundred seventy-two million, two hundred twenty-two", and thus it is an aban number.