20005159 has 2 divisors, whose sum is σ = 20005160. Its totient is φ = 20005158.

The previous prime is 20005129. The next prime is 20005163. The reversal of 20005159 is 95150002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20005159 - 2²³ = 11616551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20005129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002579 + 10002580.

It is an arithmetic number, because the mean of its divisors is an integer number (10002580).

Almost surely, 2^20005159 is an apocalyptic number.

20005159 is a deficient number, since it is larger than the sum of its proper divisors (1).

20005159 is an equidigital number, since it uses as much as digits as its factorization.

20005159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 20005159 is about 4472.7127115432. The cubic root of 20005159 is about 271.4650991204.

It can be divided in two parts, 20005 and 159, that added together give a square (20164 = 142²).

The spelling of 20005159 in words is "twenty million, five thousand, one hundred fifty-nine".