19922166 has 48 divisors (see below), whose sum is σ = 48678000. Its totient is φ = 6035040.

The previous prime is 19922143. The next prime is 19922167. The reversal of 19922166 is 66122991.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 19922166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19922167) 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, 5010 + ... + 8058.

It is an arithmetic number, because the mean of its divisors is an integer number (1014125).

Almost surely, 2^19922166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19922166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24339000).

19922166 is an abundant number, since it is smaller than the sum of its proper divisors (28755834).

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

19922166 is a wasteful number, since it uses less digits than its factorization.

19922166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082 (or 3065 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 19922166 is about 4463.4253662406. The cubic root of 19922166 is about 271.0891805820.

The spelling of 19922166 in words is "nineteen million, nine hundred twenty-two thousand, one hundred sixty-six".