20603443 has 8 divisors (see below), whose sum is σ = 24121440. Its totient is φ = 17229120.

The previous prime is 20603431. The next prime is 20603459. The reversal of 20603443 is 34430602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20603443 - 2¹³ = 20595251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20603483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35608 + ... + 36181.

It is an arithmetic number, because the mean of its divisors is an integer number (3015180).

Almost surely, 2^20603443 is an apocalyptic number.

20603443 is a deficient number, since it is larger than the sum of its proper divisors (3517997).

20603443 is an equidigital number, since it uses as much as digits as its factorization.

20603443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71837.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 20603443 is about 4539.1015630849. The cubic root of 20603443 is about 274.1447500930.

The spelling of 20603443 in words is "twenty million, six hundred three thousand, four hundred forty-three".