20248543 has 4 divisors (see below), whose sum is σ = 23141200. Its totient is φ = 17355888.

The previous prime is 20248541. The next prime is 20248559. The reversal of 20248543 is 34584202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20248543 - 2¹ = 20248541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20248541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1446318 + ... + 1446331.

It is an arithmetic number, because the mean of its divisors is an integer number (5785300).

Almost surely, 2^20248543 is an apocalyptic number.

20248543 is a deficient number, since it is larger than the sum of its proper divisors (2892657).

20248543 is an equidigital number, since it uses as much as digits as its factorization.

20248543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892656.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 20248543 is about 4499.8381081990. The cubic root of 20248543 is about 272.5615516206.

The spelling of 20248543 in words is "twenty million, two hundred forty-eight thousand, five hundred forty-three".