20825042 has 16 divisors (see below), whose sum is σ = 36460800. Its totient is φ = 8734848.

The previous prime is 20825041. The next prime is 20825047. The reversal of 20825042 is 24052802.

It is a junction number, because it is equal to n+sod(n) for n = 20824999 and 20825017.

It is not an unprimeable number, because it can be changed into a prime (20825041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15167 + ... + 16482.

It is an arithmetic number, because the mean of its divisors is an integer number (2278800).

Almost surely, 2^20825042 is an apocalyptic number.

20825042 is a deficient number, since it is larger than the sum of its proper divisors (15635758).

20825042 is a wasteful number, since it uses less digits than its factorization.

20825042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31705.

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

The square root of 20825042 is about 4563.4462854295. The cubic root of 20825042 is about 275.1240960583.

Adding to 20825042 its reverse (24052802), we get a palindrome (44877844).

The spelling of 20825042 in words is "twenty million, eight hundred twenty-five thousand, forty-two".