20458393 has 4 divisors (see below), whose sum is σ = 20717440. Its totient is φ = 20199348.

The previous prime is 20458391. The next prime is 20458397. The reversal of 20458393 is 39385402.

It is a happy number.

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 not a de Polignac number, because 20458393 - 2¹ = 20458391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20458391) 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, 129405 + ... + 129562.

It is an arithmetic number, because the mean of its divisors is an integer number (5179360).

Almost surely, 2^20458393 is an apocalyptic number.

It is an amenable number.

20458393 is a deficient number, since it is larger than the sum of its proper divisors (259047).

20458393 is an equidigital number, since it uses as much as digits as its factorization.

20458393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259046.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 20458393 is about 4523.0955108200. The cubic root of 20458393 is about 273.4999002926.

The spelling of 20458393 in words is "twenty million, four hundred fifty-eight thousand, three hundred ninety-three".