20013343 has 4 divisors (see below), whose sum is σ = 22872400. Its totient is φ = 17154288.

The previous prime is 20013319. The next prime is 20013347. The reversal of 20013343 is 34331002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34331002 = 2 ⋅17165501.

It is a cyclic number.

It is not a de Polignac number, because 20013343 - 2⁵ = 20013311 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 (20013347) 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, 1429518 + ... + 1429531.

It is an arithmetic number, because the mean of its divisors is an integer number (5718100).

Almost surely, 2^20013343 is an apocalyptic number.

20013343 is a deficient number, since it is larger than the sum of its proper divisors (2859057).

20013343 is an equidigital number, since it uses as much as digits as its factorization.

20013343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2859056.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20013343 is about 4473.6274990213. The cubic root of 20013343 is about 271.5021123643.

Adding to 20013343 its reverse (34331002), we get a palindrome (54344345).

The spelling of 20013343 in words is "twenty million, thirteen thousand, three hundred forty-three".