20072159 has 4 divisors (see below), whose sum is σ = 20719680. Its totient is φ = 19424640.

The previous prime is 20072141. The next prime is 20072161. The reversal of 20072159 is 95127002.

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 20072159 - 2¹² = 20068063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20072119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323714 + ... + 323775.

It is an arithmetic number, because the mean of its divisors is an integer number (5179920).

Almost surely, 2^20072159 is an apocalyptic number.

20072159 is a deficient number, since it is larger than the sum of its proper divisors (647521).

20072159 is an equidigital number, since it uses as much as digits as its factorization.

20072159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647520.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 20072159 is about 4480.1963126631. The cubic root of 20072159 is about 271.7678192748.

The spelling of 20072159 in words is "twenty million, seventy-two thousand, one hundred fifty-nine".