20182943 has 4 divisors (see below), whose sum is σ = 22017768. Its totient is φ = 18348120.

The previous prime is 20182933. The next prime is 20182949. The reversal of 20182943 is 34928102.

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 20182943 - 2¹⁸ = 19920799 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 (20182949) 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, 917396 + ... + 917417.

It is an arithmetic number, because the mean of its divisors is an integer number (5504442).

Almost surely, 2^20182943 is an apocalyptic number.

20182943 is a deficient number, since it is larger than the sum of its proper divisors (1834825).

20182943 is a wasteful number, since it uses less digits than its factorization.

20182943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834824.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 20182943 is about 4492.5430437560. The cubic root of 20182943 is about 272.2668903948.

The spelling of 20182943 in words is "twenty million, one hundred eighty-two thousand, nine hundred forty-three".