20610523 has 2 divisors, whose sum is σ = 20610524. Its totient is φ = 20610522.

The previous prime is 20610509. The next prime is 20610533. The reversal of 20610523 is 32501602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20610523 - 2²¹ = 18513371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20610523.

It is not a weakly prime, because it can be changed into another prime (20610533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10305261 + 10305262.

It is an arithmetic number, because the mean of its divisors is an integer number (10305262).

Almost surely, 2^20610523 is an apocalyptic number.

20610523 is a deficient number, since it is larger than the sum of its proper divisors (1).

20610523 is an equidigital number, since it uses as much as digits as its factorization.

20610523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20610523 is about 4539.8813861157. The cubic root of 20610523 is about 274.1761481227.

The spelling of 20610523 in words is "twenty million, six hundred ten thousand, five hundred twenty-three".