22136220 has 48 divisors (see below), whose sum is σ = 68869920. Its totient is φ = 5902848.

The previous prime is 22136209. The next prime is 22136239. The reversal of 22136220 is 2263122.

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 = 22136193 and 22136202.

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, 19957 + ... + 21036.

It is an arithmetic number, because the mean of its divisors is an integer number (1434790).

Almost surely, 2^22136220 is an apocalyptic number.

22136220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22136220 is an abundant number, since it is smaller than the sum of its proper divisors (46733700).

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

22136220 is a wasteful number, since it uses less digits than its factorization.

22136220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41011 (or 41003 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 22136220 is about 4704.9144519321. The cubic root of 22136220 is about 280.7810674649.

Adding to 22136220 its reverse (2263122), we get a palindrome (24399342).

The spelling of 22136220 in words is "twenty-two million, one hundred thirty-six thousand, two hundred twenty".