20541443 has 6 divisors (see below), whose sum is σ = 22243284. Its totient is φ = 18961176.

The previous prime is 20541431. The next prime is 20541449. The reversal of 20541443 is 34414502.

It is not a de Polignac number, because 20541443 - 2⁶ = 20541379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20541449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60605 + ... + 60942.

It is an arithmetic number, because the mean of its divisors is an integer number (3707214).

Almost surely, 2^20541443 is an apocalyptic number.

20541443 is a deficient number, since it is larger than the sum of its proper divisors (1701841).

20541443 is a wasteful number, since it uses less digits than its factorization.

20541443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121573 (or 121560 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20541443 is about 4532.2668721072. The cubic root of 20541443 is about 273.8694878112.

Adding to 20541443 its reverse (34414502), we get a palindrome (54955945).

The spelling of 20541443 in words is "twenty million, five hundred forty-one thousand, four hundred forty-three".