20673343 has 16 divisors (see below), whose sum is σ = 23474880. Its totient is φ = 18095616.

The previous prime is 20673329. The next prime is 20673347. The reversal of 20673343 is 34337602.

It is a de Polignac number, because none of the positive numbers 2^k-20673343 is a prime.

It is a super-2 number, since 2×20673343² = 854774221591298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13753 + ... + 15181.

It is an arithmetic number, because the mean of its divisors is an integer number (1467180).

Almost surely, 2^20673343 is an apocalyptic number.

20673343 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20673343 is a deficient number, since it is larger than the sum of its proper divisors (2801537).

20673343 is a wasteful number, since it uses less digits than its factorization.

20673343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its (nonzero) digits is 9072, while the sum is 28.

The square root of 20673343 is about 4546.7948051347. The cubic root of 20673343 is about 274.4544246794.

The spelling of 20673343 in words is "twenty million, six hundred seventy-three thousand, three hundred forty-three".