20524081 has 2 divisors, whose sum is σ = 20524082. Its totient is φ = 20524080.

The previous prime is 20524061. The next prime is 20524093. The reversal of 20524081 is 18042502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18792225 + 1731856 = 4335^2 + 1316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20524081 is a prime.

It is a super-2 number, since 2×20524081² = 842475801789122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20524061) 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, 10262040 + 10262041.

It is an arithmetic number, because the mean of its divisors is an integer number (10262041).

Almost surely, 2^20524081 is an apocalyptic number.

It is an amenable number.

20524081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20524081 is an equidigital number, since it uses as much as digits as its factorization.

20524081 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 22.

The square root of 20524081 is about 4530.3510901474. The cubic root of 20524081 is about 273.7923062434.

Adding to 20524081 its reverse (18042502), we get a palindrome (38566583).

The spelling of 20524081 in words is "twenty million, five hundred twenty-four thousand, eighty-one".