10021885 has 4 divisors (see below), whose sum is σ = 12026268. Its totient is φ = 8017504.

The previous prime is 10021883. The next prime is 10021909. The reversal of 10021885 is 58812001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58812001 = 89 ⋅660809.

It can be written as a sum of positive squares in 2 ways, for example, as 7322436 + 2699449 = 2706^2 + 1643^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021885 - 2¹ = 10021883 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 (10021883) 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, 1002184 + ... + 1002193.

It is an arithmetic number, because the mean of its divisors is an integer number (3006567).

Almost surely, 2^10021885 is an apocalyptic number.

It is an amenable number.

10021885 is a deficient number, since it is larger than the sum of its proper divisors (2004383).

10021885 is an equidigital number, since it uses as much as digits as its factorization.

10021885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004382.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 10021885 is about 3165.7360913380. The cubic root of 10021885 is about 215.6005205004.

Adding to 10021885 its reverse (58812001), we get a palindrome (68833886).

The spelling of 10021885 in words is "ten million, twenty-one thousand, eight hundred eighty-five".