22195980 has 36 divisors (see below), whose sum is σ = 67328352. Its totient is φ = 5918880.

The previous prime is 22195889. The next prime is 22195981. The reversal of 22195980 is 8959122.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22195981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61476 + ... + 61835.

It is an arithmetic number, because the mean of its divisors is an integer number (1870232).

Almost surely, 2^22195980 is an apocalyptic number.

22195980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22195980 is an abundant number, since it is smaller than the sum of its proper divisors (45132372).

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

22195980 is a wasteful number, since it uses less digits than its factorization.

22195980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123326 (or 123321 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 22195980 is about 4711.2609777001. The cubic root of 22195980 is about 281.0335104390.

The spelling of 22195980 in words is "twenty-two million, one hundred ninety-five thousand, nine hundred eighty".