20708443 has 8 divisors (see below), whose sum is σ = 23788512. Its totient is φ = 17658816.

The previous prime is 20708399. The next prime is 20708447. The reversal of 20708443 is 34480702.

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

It is a de Polignac number, because none of the positive numbers 2^k-20708443 is a prime.

It is a super-2 number, since 2×20708443² = 857679222968498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20708447) 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 7 ways as a sum of consecutive naturals, for example, 6130 + ... + 8887.

It is an arithmetic number, because the mean of its divisors is an integer number (2973564).

Almost surely, 2^20708443 is an apocalyptic number.

20708443 is a deficient number, since it is larger than the sum of its proper divisors (3080069).

20708443 is a wasteful number, since it uses less digits than its factorization.

20708443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15221.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20708443 is about 4550.6530300606. The cubic root of 20708443 is about 274.6096632957.

The spelling of 20708443 in words is "twenty million, seven hundred eight thousand, four hundred forty-three".