20294159 has 4 divisors (see below), whose sum is σ = 20311104. Its totient is φ = 20277216.

The previous prime is 20294137. The next prime is 20294161. The reversal of 20294159 is 95149202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20294159 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 (20294189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6527 + ... + 9120.

It is an arithmetic number, because the mean of its divisors is an integer number (5077776).

Almost surely, 2^20294159 is an apocalyptic number.

20294159 is a deficient number, since it is larger than the sum of its proper divisors (16945).

20294159 is a wasteful number, since it uses less digits than its factorization.

20294159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16944.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 20294159 is about 4504.9038835474. The cubic root of 20294159 is about 272.7660740383.

The spelling of 20294159 in words is "twenty million, two hundred ninety-four thousand, one hundred fifty-nine".