20341643 has 4 divisors (see below), whose sum is σ = 23247600. Its totient is φ = 17435688.

The previous prime is 20341627. The next prime is 20341649. The reversal of 20341643 is 34614302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20341643 - 2⁴ = 20341627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20341649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1452968 + ... + 1452981.

It is an arithmetic number, because the mean of its divisors is an integer number (5811900).

Almost surely, 2^20341643 is an apocalyptic number.

20341643 is a deficient number, since it is larger than the sum of its proper divisors (2905957).

20341643 is an equidigital number, since it uses as much as digits as its factorization.

20341643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905956.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20341643 is about 4510.1710610574. The cubic root of 20341643 is about 272.9786464623.

Adding to 20341643 its reverse (34614302), we get a palindrome (54955945).

The spelling of 20341643 in words is "twenty million, three hundred forty-one thousand, six hundred forty-three".