20052643 has 4 divisors (see below), whose sum is σ = 21595168. Its totient is φ = 18510120.

The previous prime is 20052623. The next prime is 20052653. The reversal of 20052643 is 34625002.

It is a happy number.

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 20052643 - 2¹⁷ = 19921571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20052623) 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, 771243 + ... + 771268.

It is an arithmetic number, because the mean of its divisors is an integer number (5398792).

Almost surely, 2^20052643 is an apocalyptic number.

20052643 is a deficient number, since it is larger than the sum of its proper divisors (1542525).

20052643 is a wasteful number, since it uses less digits than its factorization.

20052643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542524.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20052643 is about 4478.0177534262. The cubic root of 20052643 is about 271.6797114859.

Adding to 20052643 its reverse (34625002), we get a palindrome (54677645).

The spelling of 20052643 in words is "twenty million, fifty-two thousand, six hundred forty-three".