20184472 has 96 divisors (see below), whose sum is σ = 49904640. Its totient is φ = 7560000.

The previous prime is 20184443. The next prime is 20184481. The reversal of 20184472 is 27448102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20184472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133597 + ... + 133747.

It is an arithmetic number, because the mean of its divisors is an integer number (519840).

Almost surely, 2^20184472 is an apocalyptic number.

20184472 is a gapful number since it is divisible by the number (22) 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 20184472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24952320).

20184472 is an abundant number, since it is smaller than the sum of its proper divisors (29720168).

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

20184472 is a wasteful number, since it uses less digits than its factorization.

20184472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 20184472 is about 4492.7132114125. The cubic root of 20184472 is about 272.2737655990.

The spelling of 20184472 in words is "twenty million, one hundred eighty-four thousand, four hundred seventy-two".