20158071 has 4 divisors (see below), whose sum is σ = 26877432. Its totient is φ = 13438712.

The previous prime is 20158067. The next prime is 20158079. The reversal of 20158071 is 17085102.

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 20158071 - 2² = 20158067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20158079) 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, 3359676 + ... + 3359681.

It is an arithmetic number, because the mean of its divisors is an integer number (6719358).

Almost surely, 2^20158071 is an apocalyptic number.

20158071 is a deficient number, since it is larger than the sum of its proper divisors (6719361).

20158071 is an equidigital number, since it uses as much as digits as its factorization.

20158071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6719360.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 20158071 is about 4489.7740477668. The cubic root of 20158071 is about 272.1550037437.

The spelling of 20158071 in words is "twenty million, one hundred fifty-eight thousand, seventy-one".