20155000159 has 4 divisors (see below), whose sum is σ = 23034285904. Its totient is φ = 17275714416.

The previous prime is 20155000133. The next prime is 20155000163. The reversal of 20155000159 is 95100055102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20155000159 - 2⁵ = 20155000127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155001159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1439642862 + ... + 1439642875.

It is an arithmetic number, because the mean of its divisors is an integer number (5758571476).

Almost surely, 2^20155000159 is an apocalyptic number.

20155000159 is a deficient number, since it is larger than the sum of its proper divisors (2879285745).

20155000159 is an equidigital number, since it uses as much as digits as its factorization.

20155000159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879285744.

The product of its (nonzero) digits is 2250, while the sum is 28.

The spelling of 20155000159 in words is "twenty billion, one hundred fifty-five million, one hundred fifty-nine", and thus it is an aban number.