20613384 has 96 divisors (see below), whose sum is σ = 64527840. Its totient is φ = 5875200.

The previous prime is 20613377. The next prime is 20613407. The reversal of 20613384 is 48331602.

It is a happy 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, 12699 + ... + 14229.

It is an arithmetic number, because the mean of its divisors is an integer number (672165).

Almost surely, 2^20613384 is an apocalyptic number.

20613384 is a gapful number since it is divisible by the number (24) 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 20613384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32263920).

20613384 is an abundant number, since it is smaller than the sum of its proper divisors (43914456).

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

20613384 is a wasteful number, since it uses less digits than its factorization.

20613384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1564 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 20613384 is about 4540.1964715197. The cubic root of 20613384 is about 274.1888339025.

Adding to 20613384 its reverse (48331602), we get a palindrome (68944986).

It can be divided in two parts, 2061 and 3384, that added together give a palindrome (5445).

The spelling of 20613384 in words is "twenty million, six hundred thirteen thousand, three hundred eighty-four".