20825029 has 4 divisors (see below), whose sum is σ = 21309376. Its totient is φ = 20340684.

The previous prime is 20825023. The next prime is 20825041. The reversal of 20825029 is 92052802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20825029 - 2⁵ = 20824997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20824988 and 20825006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20825023) 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, 242109 + ... + 242194.

It is an arithmetic number, because the mean of its divisors is an integer number (5327344).

Almost surely, 2^20825029 is an apocalyptic number.

It is an amenable number.

20825029 is a deficient number, since it is larger than the sum of its proper divisors (484347).

20825029 is an equidigital number, since it uses as much as digits as its factorization.

20825029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484346.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20825029 is about 4563.4448610671. Note that the first 3 decimals coincide. The cubic root of 20825029 is about 275.1240388097.

The spelling of 20825029 in words is "twenty million, eight hundred twenty-five thousand, twenty-nine".