20825943 has 4 divisors (see below), whose sum is σ = 27767928. Its totient is φ = 13883960.

The previous prime is 20825939. The next prime is 20825963. The reversal of 20825943 is 34952802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20825943 - 2² = 20825939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3470988 + ... + 3470993.

It is an arithmetic number, because the mean of its divisors is an integer number (6941982).

Almost surely, 2^20825943 is an apocalyptic number.

20825943 is a deficient number, since it is larger than the sum of its proper divisors (6941985).

20825943 is an equidigital number, since it uses as much as digits as its factorization.

20825943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6941984.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 20825943 is about 4563.5450036129. The cubic root of 20825943 is about 275.1280637692.

The spelling of 20825943 in words is "twenty million, eight hundred twenty-five thousand, nine hundred forty-three".