20829827 has 4 divisors (see below), whose sum is σ = 21063960. Its totient is φ = 20595696.

The previous prime is 20829821. The next prime is 20829839. The reversal of 20829827 is 72892802.

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 20829827 - 2¹⁰ = 20828803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20829821) 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, 116933 + ... + 117110.

It is an arithmetic number, because the mean of its divisors is an integer number (5265990).

Almost surely, 2^20829827 is an apocalyptic number.

20829827 is a deficient number, since it is larger than the sum of its proper divisors (234133).

20829827 is an equidigital number, since it uses as much as digits as its factorization.

20829827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234132.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 20829827 is about 4563.9705301415. The cubic root of 20829827 is about 275.1451663317.

The spelling of 20829827 in words is "twenty million, eight hundred twenty-nine thousand, eight hundred twenty-seven".