20025824 has 108 divisors (see below), whose sum is σ = 51004296. Its totient is φ = 7577856.

The previous prime is 20025823. The next prime is 20025833. The reversal of 20025824 is 42852002.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 20025824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025823) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 870677 + ... + 870699.

It is an arithmetic number, because the mean of its divisors is an integer number (472262).

Almost surely, 2^20025824 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 20025824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25502148).

20025824 is an abundant number, since it is smaller than the sum of its proper divisors (30978472).

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

20025824 is a wasteful number, since it uses less digits than its factorization.

20025824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 20025824 is about 4475.0222345816. The cubic root of 20025824 is about 271.5585399467.

Adding to 20025824 its reverse (42852002), we get a palindrome (62877826).

The spelling of 20025824 in words is "twenty million, twenty-five thousand, eight hundred twenty-four".