20256341 has 4 divisors (see below), whose sum is σ = 23150112. Its totient is φ = 17362572.

The previous prime is 20256329. The next prime is 20256349. The reversal of 20256341 is 14365202.

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-20256341 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 (20256349) 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, 1446875 + ... + 1446888.

It is an arithmetic number, because the mean of its divisors is an integer number (5787528).

Almost surely, 2^20256341 is an apocalyptic number.

It is an amenable number.

20256341 is a deficient number, since it is larger than the sum of its proper divisors (2893771).

20256341 is an equidigital number, since it uses as much as digits as its factorization.

20256341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893770.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20256341 is about 4500.7045004088. The cubic root of 20256341 is about 272.5965362315.

The spelling of 20256341 in words is "twenty million, two hundred fifty-six thousand, three hundred forty-one".