20456193 has 4 divisors (see below), whose sum is σ = 27274928. Its totient is φ = 13637460.

The previous prime is 20456143. The next prime is 20456197. The reversal of 20456193 is 39165402.

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 20456193 - 2⁶ = 20456129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20456193.

It is not an unprimeable number, because it can be changed into a prime (20456197) 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, 3409363 + ... + 3409368.

It is an arithmetic number, because the mean of its divisors is an integer number (6818732).

Almost surely, 2^20456193 is an apocalyptic number.

It is an amenable number.

20456193 is a deficient number, since it is larger than the sum of its proper divisors (6818735).

20456193 is an equidigital number, since it uses as much as digits as its factorization.

20456193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818734.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 20456193 is about 4522.8523080021. The cubic root of 20456193 is about 273.4900963074.

The spelling of 20456193 in words is "twenty million, four hundred fifty-six thousand, one hundred ninety-three".