20051824 has 40 divisors (see below), whose sum is σ = 42184800. Its totient is φ = 9178368.

The previous prime is 20051819. The next prime is 20051831. The reversal of 20051824 is 42815002.

It is a junction number, because it is equal to n+sod(n) for n = 20051795 and 20051804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30669 + ... + 31315.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^20051824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20051824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21092400).

20051824 is an abundant number, since it is smaller than the sum of its proper divisors (22132976).

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

20051824 is a wasteful number, since it uses less digits than its factorization.

20051824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20051824 is about 4477.9263057804. The cubic root of 20051824 is about 271.6760127430.

Adding to 20051824 its reverse (42815002), we get a palindrome (62866826).

The spelling of 20051824 in words is "twenty million, fifty-one thousand, eight hundred twenty-four".