20562243 has 8 divisors (see below), whose sum is σ = 29525328. Its totient is φ = 12653664.

The previous prime is 20562229. The next prime is 20562257. The reversal of 20562243 is 34226502.

It is an interprime number because it is at equal distance from previous prime (20562229) and next prime (20562257).

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

It is not a de Polignac number, because 20562243 - 2⁹ = 20561731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20562203) 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 7 ways as a sum of consecutive naturals, for example, 263580 + ... + 263657.

It is an arithmetic number, because the mean of its divisors is an integer number (3690666).

Almost surely, 2^20562243 is an apocalyptic number.

20562243 is a deficient number, since it is larger than the sum of its proper divisors (8963085).

20562243 is a wasteful number, since it uses less digits than its factorization.

20562243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527253.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20562243 is about 4534.5609489784. The cubic root of 20562243 is about 273.9618955305.

Adding to 20562243 its reverse (34226502), we get a palindrome (54788745).

The spelling of 20562243 in words is "twenty million, five hundred sixty-two thousand, two hundred forty-three".