20087843 has 2 divisors, whose sum is σ = 20087844. Its totient is φ = 20087842.

The previous prime is 20087839. The next prime is 20087857. The reversal of 20087843 is 34878002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20087843 - 2² = 20087839 is a prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (20087813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10043921 + 10043922.

It is an arithmetic number, because the mean of its divisors is an integer number (10043922).

Almost surely, 2^20087843 is an apocalyptic number.

20087843 is a deficient number, since it is larger than the sum of its proper divisors (1).

20087843 is an equidigital number, since it uses as much as digits as its factorization.

20087843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20087843 is about 4481.9463405980. The cubic root of 20087843 is about 271.8385855664.

The spelling of 20087843 in words is "twenty million, eighty-seven thousand, eight hundred forty-three".