20325511 has 2 divisors, whose sum is σ = 20325512. Its totient is φ = 20325510.

The previous prime is 20325493. The next prime is 20325517. The reversal of 20325511 is 11552302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20325511 - 2⁹ = 20324999 is a prime.

It is a super-2 number, since 2×20325511² = 826252794822242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20325517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10162755 + 10162756.

It is an arithmetic number, because the mean of its divisors is an integer number (10162756).

Almost surely, 2^20325511 is an apocalyptic number.

20325511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20325511 is an equidigital number, since it uses as much as digits as its factorization.

20325511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 20325511 is about 4508.3823041086. The cubic root of 20325511 is about 272.9064652041.

Adding to 20325511 its reverse (11552302), we get a palindrome (31877813).

The spelling of 20325511 in words is "twenty million, three hundred twenty-five thousand, five hundred eleven".