19922000 has 80 divisors (see below), whose sum is σ = 55091712. Its totient is φ = 6825600.

The previous prime is 19921997. The next prime is 19922033. The reversal of 19922000 is 22991.

It is a tau number, because it is divible by the number of its divisors (80).

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, 13289 + ... + 14711.

Almost surely, 2^19922000 is an apocalyptic number.

19922000 is a gapful number since it is divisible by the number (10) 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 19922000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27545856).

19922000 is an abundant number, since it is smaller than the sum of its proper divisors (35169712).

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

19922000 is a wasteful number, since it uses less digits than its factorization.

19922000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 19922000 is about 4463.4067706182. The cubic root of 19922000 is about 271.0884276362.

Adding to 19922000 its reverse (22991), we get a palindrome (19944991).

The spelling of 19922000 in words is "nineteen million, nine hundred twenty-two thousand".