20653159 has 2 divisors, whose sum is σ = 20653160. Its totient is φ = 20653158.

The previous prime is 20653153. The next prime is 20653169. The reversal of 20653159 is 95135602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20653159 - 2³ = 20653151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20653159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20653151) 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, 10326579 + 10326580.

It is an arithmetic number, because the mean of its divisors is an integer number (10326580).

Almost surely, 2^20653159 is an apocalyptic number.

20653159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20653159 is an equidigital number, since it uses as much as digits as its factorization.

20653159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 20653159 is about 4544.5746775688. The cubic root of 20653159 is about 274.3650762544.

The spelling of 20653159 in words is "twenty million, six hundred fifty-three thousand, one hundred fifty-nine".