22156680 has 128 divisors (see below), whose sum is σ = 81849600. Its totient is φ = 4672512.

The previous prime is 22156663. The next prime is 22156681. The reversal of 22156680 is 8665122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22156681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9906 + ... + 11934.

It is an arithmetic number, because the mean of its divisors is an integer number (639450).

Almost surely, 2^22156680 is an apocalyptic number.

22156680 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 22156680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40924800).

22156680 is an abundant number, since it is smaller than the sum of its proper divisors (59692920).

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

22156680 is a wasteful number, since it uses less digits than its factorization.

22156680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063 (or 2059 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 22156680 is about 4707.0882719575. The cubic root of 22156680 is about 280.8675473249.

The spelling of 22156680 in words is "twenty-two million, one hundred fifty-six thousand, six hundred eighty".