20042193 has 4 divisors (see below), whose sum is σ = 26722928. Its totient is φ = 13361460.

The previous prime is 20042173. The next prime is 20042249. The reversal of 20042193 is 39124002.

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 not a de Polignac number, because 20042193 - 2¹⁷ = 19911121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20042173) 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, 3340363 + ... + 3340368.

It is an arithmetic number, because the mean of its divisors is an integer number (6680732).

Almost surely, 2^20042193 is an apocalyptic number.

It is an amenable number.

20042193 is a deficient number, since it is larger than the sum of its proper divisors (6680735).

20042193 is an equidigital number, since it uses as much as digits as its factorization.

20042193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680734.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 20042193 is about 4476.8507904553. The cubic root of 20042193 is about 271.6325099558.

Adding to 20042193 its reverse (39124002), we get a palindrome (59166195).

The spelling of 20042193 in words is "twenty million, forty-two thousand, one hundred ninety-three".