20825134 has 16 divisors (see below), whose sum is σ = 34311600. Its totient is φ = 9400960.

The previous prime is 20825099. The next prime is 20825177. The reversal of 20825134 is 43152802.

It is a super-2 number, since 2×20825134² = 867372412235912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20825099 and 20825108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102 + ... + 6454.

It is an arithmetic number, because the mean of its divisors is an integer number (2144475).

Almost surely, 2^20825134 is an apocalyptic number.

20825134 is a deficient number, since it is larger than the sum of its proper divisors (13486466).

20825134 is a wasteful number, since it uses less digits than its factorization.

20825134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6515.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20825134 is about 4563.4563655195. The cubic root of 20825134 is about 275.1245012016.

Adding to 20825134 its reverse (43152802), we get a palindrome (63977936).

The spelling of 20825134 in words is "twenty million, eight hundred twenty-five thousand, one hundred thirty-four".