20452043 has 4 divisors (see below), whose sum is σ = 20599320. Its totient is φ = 20304768.

The previous prime is 20452039. The next prime is 20452049. The reversal of 20452043 is 34025402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34025402 = 2 ⋅17012701.

It is a cyclic number.

It is not a de Polignac number, because 20452043 - 2² = 20452039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20452049) 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 3 ways as a sum of consecutive naturals, for example, 73430 + ... + 73707.

It is an arithmetic number, because the mean of its divisors is an integer number (5149830).

Almost surely, 2^20452043 is an apocalyptic number.

20452043 is a deficient number, since it is larger than the sum of its proper divisors (147277).

20452043 is a wasteful number, since it uses less digits than its factorization.

20452043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147276.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 20452043 is about 4522.3935034448. The cubic root of 20452043 is about 273.4716005123.

Adding to 20452043 its reverse (34025402), we get a palindrome (54477445).

The spelling of 20452043 in words is "twenty million, four hundred fifty-two thousand, forty-three".