20252543 has 2 divisors, whose sum is σ = 20252544. Its totient is φ = 20252542.

The previous prime is 20252539. The next prime is 20252611. The reversal of 20252543 is 34525202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20252543 - 2² = 20252539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20252503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10126271 + 10126272.

It is an arithmetic number, because the mean of its divisors is an integer number (10126272).

Almost surely, 2^20252543 is an apocalyptic number.

20252543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20252543 is an equidigital number, since it uses as much as digits as its factorization.

20252543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20252543 is about 4500.2825466853. The cubic root of 20252543 is about 272.5794981699.

Adding to 20252543 its reverse (34525202), we get a palindrome (54777745).

The spelling of 20252543 in words is "twenty million, two hundred fifty-two thousand, five hundred forty-three".