20824061 has 4 divisors (see below), whose sum is σ = 20852832. Its totient is φ = 20795292.

The previous prime is 20824051. The next prime is 20824073. The reversal of 20824061 is 16042802.

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 20824061 - 2¹⁸ = 20561917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20824051) 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, 13271 + ... + 14756.

It is an arithmetic number, because the mean of its divisors is an integer number (5213208).

Almost surely, 2^20824061 is an apocalyptic number.

It is an amenable number.

20824061 is a deficient number, since it is larger than the sum of its proper divisors (28771).

20824061 is an equidigital number, since it uses as much as digits as its factorization.

20824061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28770.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 20824061 is about 4563.3387996071. The cubic root of 20824061 is about 275.1197759233.

Adding to 20824061 its reverse (16042802), we get a palindrome (36866863).

The spelling of 20824061 in words is "twenty million, eight hundred twenty-four thousand, sixty-one".