20825411 has 2 divisors, whose sum is σ = 20825412. Its totient is φ = 20825410.

The previous prime is 20825381. The next prime is 20825423. The reversal of 20825411 is 11452802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20825411 - 2⁶ = 20825347 is a prime.

It is not a weakly prime, because it can be changed into another prime (20825471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10412705 + 10412706.

It is an arithmetic number, because the mean of its divisors is an integer number (10412706).

Almost surely, 2^20825411 is an apocalyptic number.

20825411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20825411 is an equidigital number, since it uses as much as digits as its factorization.

20825411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 20825411 is about 4563.4867152212. The cubic root of 20825411 is about 275.1257210281.

The spelling of 20825411 in words is "twenty million, eight hundred twenty-five thousand, four hundred eleven".