20006893 has 4 divisors (see below), whose sum is σ = 20494908. Its totient is φ = 19518880.

The previous prime is 20006887. The next prime is 20006923. The reversal of 20006893 is 39860002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5846724 + 14160169 = 2418^2 + 3763^2 .

It is a cyclic number.

It is not a de Polignac number, because 20006893 - 2¹³ = 19998701 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 (20006813) 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, 243946 + ... + 244027.

It is an arithmetic number, because the mean of its divisors is an integer number (5123727).

Almost surely, 2^20006893 is an apocalyptic number.

It is an amenable number.

20006893 is a deficient number, since it is larger than the sum of its proper divisors (488015).

20006893 is an equidigital number, since it uses as much as digits as its factorization.

20006893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488014.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20006893 is about 4472.9065494374. The cubic root of 20006893 is about 271.4729422120.

Adding to 20006893 its reverse (39860002), we get a palindrome (59866895).

The spelling of 20006893 in words is "twenty million, six thousand, eight hundred ninety-three".