20271193 has 4 divisors (see below), whose sum is σ = 20286720. Its totient is φ = 20255668.

The previous prime is 20271187. The next prime is 20271197. The reversal of 20271193 is 39117202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20271193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20271197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5605 + ... + 8482.

It is an arithmetic number, because the mean of its divisors is an integer number (5071680).

Almost surely, 2^20271193 is an apocalyptic number.

It is an amenable number.

20271193 is a deficient number, since it is larger than the sum of its proper divisors (15527).

20271193 is a wasteful number, since it uses less digits than its factorization.

20271193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15526.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 20271193 is about 4502.3541619913. The cubic root of 20271193 is about 272.6631427767.

Adding to 20271193 its reverse (39117202), we get a palindrome (59388395).

The spelling of 20271193 in words is "twenty million, two hundred seventy-one thousand, one hundred ninety-three".