10018993 has 2 divisors, whose sum is σ = 10018994. Its totient is φ = 10018992.

The previous prime is 10018991. The next prime is 10019021. The reversal of 10018993 is 39981001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5721664 + 4297329 = 2392^2 + 2073^2 .

It is a cyclic number.

It is not a de Polignac number, because 10018993 - 2¹ = 10018991 is a prime.

Together with 10018991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10018991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5009496 + 5009497.

It is an arithmetic number, because the mean of its divisors is an integer number (5009497).

Almost surely, 2^10018993 is an apocalyptic number.

It is an amenable number.

10018993 is a deficient number, since it is larger than the sum of its proper divisors (1).

10018993 is an equidigital number, since it uses as much as digits as its factorization.

10018993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 10018993 is about 3165.2792925744. The cubic root of 10018993 is about 215.5797800013.

Adding to 10018993 its reverse (39981001), we get a palindrome (49999994).

It can be divided in two parts, 10018 and 993, that added together give a palindrome (11011).

The spelling of 10018993 in words is "ten million, eighteen thousand, nine hundred ninety-three".