10021393 has 2 divisors, whose sum is σ = 10021394. Its totient is φ = 10021392.

The previous prime is 10021357. The next prime is 10021411. The reversal of 10021393 is 39312001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5303809 + 4717584 = 2303^2 + 2172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10021393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10021393.

It is not a weakly prime, because it can be changed into another prime (10021093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010696 + 5010697.

It is an arithmetic number, because the mean of its divisors is an integer number (5010697).

Almost surely, 2^10021393 is an apocalyptic number.

It is an amenable number.

10021393 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021393 is an equidigital number, since it uses as much as digits as its factorization.

10021393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 10021393 is about 3165.6583833383. The cubic root of 10021393 is about 215.5969923155.

Adding to 10021393 its reverse (39312001), we get a palindrome (49333394).

The spelling of 10021393 in words is "ten million, twenty-one thousand, three hundred ninety-three".