22105015220 has 24 divisors (see below), whose sum is σ = 46458354600. Its totient is φ = 8834801792.

The previous prime is 22105015213. The next prime is 22105015271. The reversal of 22105015220 is 2251050122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15598011664 + 6507003556 = 124892^2 + 80666^2 .

It is a super-3 number, since 3×22105015220³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22105015192 and 22105015201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425075 + ... + 474234.

It is an arithmetic number, because the mean of its divisors is an integer number (1935764775).

Almost surely, 2^22105015220 is an apocalyptic number.

22105015220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22105015220 is an abundant number, since it is smaller than the sum of its proper divisors (24353339380).

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

22105015220 is a wasteful number, since it uses less digits than its factorization.

22105015220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900547 (or 900545 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 22105015220 its reverse (2251050122), we get a palindrome (24356065342).

The spelling of 22105015220 in words is "twenty-two billion, one hundred five million, fifteen thousand, two hundred twenty".