20072843 has 16 divisors (see below), whose sum is σ = 24135360. Its totient is φ = 16329600.

The previous prime is 20072839. The next prime is 20072867. The reversal of 20072843 is 34827002.

It is not a de Polignac number, because 20072843 - 2² = 20072839 is a prime.

It is a super-2 number, since 2×20072843² = 805838052205298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20072543) 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 15 ways as a sum of consecutive naturals, for example, 11573 + ... + 13193.

It is an arithmetic number, because the mean of its divisors is an integer number (1508460).

Almost surely, 2^20072843 is an apocalyptic number.

20072843 is a deficient number, since it is larger than the sum of its proper divisors (4062517).

20072843 is a wasteful number, since it uses less digits than its factorization.

20072843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718.

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

The square root of 20072843 is about 4480.2726479535. The cubic root of 20072843 is about 271.7709062551.

Adding to 20072843 its reverse (34827002), we get a palindrome (54899845).

The spelling of 20072843 in words is "twenty million, seventy-two thousand, eight hundred forty-three".