20004893 has 2 divisors, whose sum is σ = 20004894. Its totient is φ = 20004892.

The previous prime is 20004883. The next prime is 20004923. The reversal of 20004893 is 39840002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19731364 + 273529 = 4442^2 + 523^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004893 - 2¹⁰ = 20003869 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20004823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002446 + 10002447.

It is an arithmetic number, because the mean of its divisors is an integer number (10002447).

Almost surely, 2^20004893 is an apocalyptic number.

It is an amenable number.

20004893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004893 is an equidigital number, since it uses as much as digits as its factorization.

20004893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20004893 is about 4472.6829755752. The cubic root of 20004893 is about 271.4638959302.

Adding to 20004893 its reverse (39840002), we get a palindrome (59844895).

The spelling of 20004893 in words is "twenty million, four thousand, eight hundred ninety-three".