20888159 has 2 divisors, whose sum is σ = 20888160. Its totient is φ = 20888158.

The previous prime is 20888143. The next prime is 20888171. The reversal of 20888159 is 95188802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20888159 - 2⁴ = 20888143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20888759) 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, 10444079 + 10444080.

It is an arithmetic number, because the mean of its divisors is an integer number (10444080).

Almost surely, 2^20888159 is an apocalyptic number.

20888159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20888159 is an equidigital number, since it uses as much as digits as its factorization.

20888159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 20888159 is about 4570.3565506424. The cubic root of 20888159 is about 275.4017664648.

The spelling of 20888159 in words is "twenty million, eight hundred eighty-eight thousand, one hundred fifty-nine".