19228020 has 96 divisors (see below), whose sum is σ = 65173248. Its totient is φ = 4134912.

The previous prime is 19227991. The next prime is 19228021. The reversal of 19228020 is 2082291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19228021) 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, 5794 + ... + 8486.

It is an arithmetic number, because the mean of its divisors is an integer number (678888).

Almost surely, 2^19228020 is an apocalyptic number.

19228020 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 19228020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32586624).

19228020 is an abundant number, since it is smaller than the sum of its proper divisors (45945228).

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

19228020 is a wasteful number, since it uses less digits than its factorization.

19228020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729 (or 2727 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 19228020 is about 4384.9766247952. The cubic root of 19228020 is about 267.9033772128.

The spelling of 19228020 in words is "nineteen million, two hundred twenty-eight thousand, twenty".