19932220 has 108 divisors (see below), whose sum is σ = 54382104. Its totient is φ = 6068160.

The previous prime is 19932217. The next prime is 19932221. The reversal of 19932220 is 2223991.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19932221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 463519 + ... + 463561.

It is an arithmetic number, because the mean of its divisors is an integer number (503538).

Almost surely, 2^19932220 is an apocalyptic number.

19932220 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 19932220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27191052).

19932220 is an abundant number, since it is smaller than the sum of its proper divisors (34449884).

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

19932220 is a wasteful number, since it uses less digits than its factorization.

19932220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 19932220 is about 4464.5514892316. The cubic root of 19932220 is about 271.1347758962.

It can be divided in two parts, 19 and 932220, that added together give a palindrome (932239).

The spelling of 19932220 in words is "nineteen million, nine hundred thirty-two thousand, two hundred twenty".