20920443 has 8 divisors (see below), whose sum is σ = 28793856. Its totient is φ = 13497000.

The previous prime is 20920441. The next prime is 20920457. The reversal of 20920443 is 34402902.

It is a happy number.

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

It is not a de Polignac number, because 20920443 - 2¹ = 20920441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20920441) 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, 112383 + ... + 112568.

It is an arithmetic number, because the mean of its divisors is an integer number (3599232).

Almost surely, 2^20920443 is an apocalyptic number.

20920443 is a deficient number, since it is larger than the sum of its proper divisors (7873413).

20920443 is a wasteful number, since it uses less digits than its factorization.

20920443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224985.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20920443 is about 4573.8870777491. The cubic root of 20920443 is about 275.5435771749.

The spelling of 20920443 in words is "twenty million, nine hundred twenty thousand, four hundred forty-three".