20825011 has 2 divisors, whose sum is σ = 20825012. Its totient is φ = 20825010.

The previous prime is 20825009. The next prime is 20825023. The reversal of 20825011 is 11052802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20825011 - 2¹ = 20825009 is a prime.

Together with 20825009, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20825011.

It is not a weakly prime, because it can be changed into another prime (20825041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10412505 + 10412506.

It is an arithmetic number, because the mean of its divisors is an integer number (10412506).

Almost surely, 2^20825011 is an apocalyptic number.

20825011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20825011 is an equidigital number, since it uses as much as digits as its factorization.

20825011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 20825011 is about 4563.4428888724. The cubic root of 20825011 is about 275.1239595424.

Adding to 20825011 its reverse (11052802), we get a palindrome (31877813).

The spelling of 20825011 in words is "twenty million, eight hundred twenty-five thousand, eleven".