20562443 has 16 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 18043200.

The previous prime is 20562439. The next prime is 20562457. The reversal of 20562443 is 34426502.

It is a cyclic number.

It is not a de Polignac number, because 20562443 - 2² = 20562439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20562403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57098 + ... + 57456.

It is an arithmetic number, because the mean of its divisors is an integer number (1451520).

Almost surely, 2^20562443 is an apocalyptic number.

20562443 is a deficient number, since it is larger than the sum of its proper divisors (2661877).

20562443 is a wasteful number, since it uses less digits than its factorization.

20562443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 20562443 is about 4534.5830017765. The cubic root of 20562443 is about 273.9627837638.

Adding to 20562443 its reverse (34426502), we get a palindrome (54988945).

The spelling of 20562443 in words is "twenty million, five hundred sixty-two thousand, four hundred forty-three".