20943043 has 12 divisors (see below), whose sum is σ = 23345224. Its totient is φ = 18770400.

The previous prime is 20943029. The next prime is 20943049. The reversal of 20943043 is 34034902.

It is not a de Polignac number, because 20943043 - 2¹⁷ = 20811971 is a prime.

It is a super-2 number, since 2×20943043² = 877222100199698, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20942999 and 20943017.

It is not an unprimeable number, because it can be changed into a prime (20943049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7648 + ... + 10018.

Almost surely, 2^20943043 is an apocalyptic number.

20943043 is a deficient number, since it is larger than the sum of its proper divisors (2402181).

20943043 is a wasteful number, since it uses less digits than its factorization.

20943043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466 (or 2455 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 20943043 is about 4576.3569572314. The cubic root of 20943043 is about 275.6427631527.

Adding to 20943043 its reverse (34034902), we get a palindrome (54977945).

The spelling of 20943043 in words is "twenty million, nine hundred forty-three thousand, forty-three".