23022011220 has 288 divisors, whose sum is σ = 72290789760. Its totient is φ = 5440158720.

The previous prime is 23022011171. The next prime is 23022011227. The reversal of 23022011220 is 2211022032.

It is a happy number.

It is a super-2 number, since 2×23022011220² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23022011220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23022011227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 165625911 + ... + 165626049.

Almost surely, 2^23022011220 is an apocalyptic number.

23022011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23022011220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36145394880).

23022011220 is an abundant number, since it is smaller than the sum of its proper divisors (49268778540).

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

23022011220 is a wasteful number, since it uses less digits than its factorization.

23022011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 23022011220 its reverse (2211022032), we get a palindrome (25233033252).

The spelling of 23022011220 in words is "twenty-three billion, twenty-two million, eleven thousand, two hundred twenty".