20825142 has 32 divisors (see below), whose sum is σ = 45050208. Its totient is φ = 6379776.

The previous prime is 20825099. The next prime is 20825177. The reversal of 20825142 is 24152802.

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 15 ways as a sum of consecutive naturals, for example, 23988 + ... + 24840.

It is an arithmetic number, because the mean of its divisors is an integer number (1407819).

Almost surely, 2^20825142 is an apocalyptic number.

20825142 is an abundant number, since it is smaller than the sum of its proper divisors (24225066).

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

20825142 is a wasteful number, since it uses less digits than its factorization.

20825142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20825142 is about 4563.4572420480. The cubic root of 20825142 is about 275.1245364314.

Adding to 20825142 its reverse (24152802), we get a palindrome (44977944).

The spelling of 20825142 in words is "twenty million, eight hundred twenty-five thousand, one hundred forty-two".