20825293 has 2 divisors, whose sum is σ = 20825294. Its totient is φ = 20825292.

The previous prime is 20825267. The next prime is 20825297. The reversal of 20825293 is 39252802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19909444 + 915849 = 4462^2 + 957^2 .

It is a cyclic number.

It is not a de Polignac number, because 20825293 - 2⁹ = 20824781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20825297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10412646 + 10412647.

It is an arithmetic number, because the mean of its divisors is an integer number (10412647).

Almost surely, 2^20825293 is an apocalyptic number.

It is an amenable number.

20825293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20825293 is an equidigital number, since it uses as much as digits as its factorization.

20825293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20825293 is about 4563.4737864920. The cubic root of 20825293 is about 275.1252013921.

The spelling of 20825293 in words is "twenty million, eight hundred twenty-five thousand, two hundred ninety-three".