22201020 has 48 divisors (see below), whose sum is σ = 69071520. Its totient is φ = 5920128.

The previous prime is 22201019. The next prime is 22201033. The reversal of 22201020 is 2010222.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 22200993 and 22201011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20017 + ... + 21096.

It is an arithmetic number, because the mean of its divisors is an integer number (1438990).

Almost surely, 2^22201020 is an apocalyptic number.

22201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22201020 is an abundant number, since it is smaller than the sum of its proper divisors (46870500).

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

22201020 is a wasteful number, since it uses less digits than its factorization.

22201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41131 (or 41123 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 22201020 is about 4711.7958359844. The cubic root of 22201020 is about 281.0547800818.

Adding to 22201020 its reverse (2010222), we get a palindrome (24211242).

It can be divided in two parts, 2220 and 1020, that added together give a triangular number (3240 = T₈₀).

The spelling of 22201020 in words is "twenty-two million, two hundred one thousand, twenty".