22195620 has 72 divisors (see below), whose sum is σ = 69835584. Its totient is φ = 5917536.

The previous prime is 22195583. The next prime is 22195627. The reversal of 22195620 is 2659122.

22195620 is a `hidden beast` number, since 22 + 19 + 5 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22195627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2577 + ... + 7143.

Almost surely, 2^22195620 is an apocalyptic number.

22195620 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 22195620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34917792).

22195620 is an abundant number, since it is smaller than the sum of its proper divisors (47639964).

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

22195620 is a wasteful number, since it uses less digits than its factorization.

22195620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4591 (or 4577 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 22195620 is about 4711.2227712134. Note that the first 3 decimals coincide. The cubic root of 22195620 is about 281.0319910556.

The spelling of 22195620 in words is "twenty-two million, one hundred ninety-five thousand, six hundred twenty".