20413343 has 4 divisors (see below), whose sum is σ = 20465160. Its totient is φ = 20361528.

The previous prime is 20413331. The next prime is 20413357. The reversal of 20413343 is 34331402.

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 20413343 - 2⁶ = 20413279 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 (20416343) 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, 25313 + ... + 26106.

It is an arithmetic number, because the mean of its divisors is an integer number (5116290).

Almost surely, 2^20413343 is an apocalyptic number.

20413343 is a deficient number, since it is larger than the sum of its proper divisors (51817).

20413343 is an equidigital number, since it uses as much as digits as its factorization.

20413343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51816.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20413343 is about 4518.1127697303. The cubic root of 20413343 is about 273.2990010749.

Adding to 20413343 its reverse (34331402), we get a palindrome (54744745).

The spelling of 20413343 in words is "twenty million, four hundred thirteen thousand, three hundred forty-three".