20825064 has 96 divisors (see below), whose sum is σ = 63991200. Its totient is φ = 6065280.

The previous prime is 20825047. The next prime is 20825071. The reversal of 20825064 is 46052802.

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, 17199 + ... + 18369.

It is an arithmetic number, because the mean of its divisors is an integer number (666575).

Almost surely, 2^20825064 is an apocalyptic number.

20825064 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 20825064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31995600).

20825064 is an abundant number, since it is smaller than the sum of its proper divisors (43166136).

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

20825064 is a wasteful number, since it uses less digits than its factorization.

20825064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20825064 is about 4563.4486958878. The cubic root of 20825064 is about 275.1241929405.

Adding to 20825064 its reverse (46052802), we get a palindrome (66877866).

The spelling of 20825064 in words is "twenty million, eight hundred twenty-five thousand, sixty-four".