20889343 has 4 divisors (see below), whose sum is σ = 20944840. Its totient is φ = 20833848.

The previous prime is 20889299. The next prime is 20889347. The reversal of 20889343 is 34398802.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20889343 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 (20889347) 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, 27180 + ... + 27937.

It is an arithmetic number, because the mean of its divisors is an integer number (5236210).

Almost surely, 2^20889343 is an apocalyptic number.

20889343 is a deficient number, since it is larger than the sum of its proper divisors (55497).

20889343 is an equidigital number, since it uses as much as digits as its factorization.

20889343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55496.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 20889343 is about 4570.4860791824. The cubic root of 20889343 is about 275.4069698838.

The spelling of 20889343 in words is "twenty million, eight hundred eighty-nine thousand, three hundred forty-three".