20027843 has 16 divisors (see below), whose sum is σ = 23308800. Its totient is φ = 17016480.

The previous prime is 20027801. The next prime is 20027851. The reversal of 20027843 is 34872002.

It is a cyclic number.

It is not a de Polignac number, because 20027843 - 2¹² = 20023747 is a prime.

It is a super-2 number, since 2×20027843² = 802228990465298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20027863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15905 + ... + 17117.

It is an arithmetic number, because the mean of its divisors is an integer number (1456800).

Almost surely, 2^20027843 is an apocalyptic number.

20027843 is a deficient number, since it is larger than the sum of its proper divisors (3280957).

20027843 is a wasteful number, since it uses less digits than its factorization.

20027843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20027843 is about 4475.2478143674. The cubic root of 20027843 is about 271.5676658012.

Adding to 20027843 its reverse (34872002), we get a palindrome (54899845).

The spelling of 20027843 in words is "twenty million, twenty-seven thousand, eight hundred forty-three".