10021995 has 32 divisors (see below), whose sum is σ = 18123840. Its totient is φ = 5253120.

The previous prime is 10021969. The next prime is 10022009. The reversal of 10021995 is 59912001.

It is a happy number.

It is not a de Polignac number, because 10021995 - 2¹⁰ = 10020971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7627 + ... + 8843.

It is an arithmetic number, because the mean of its divisors is an integer number (566370).

Almost surely, 2^10021995 is an apocalyptic number.

10021995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10021995 is a deficient number, since it is larger than the sum of its proper divisors (8101845).

10021995 is a wasteful number, since it uses less digits than its factorization.

10021995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 10021995 is about 3165.7534648169. The cubic root of 10021995 is about 215.6013093065.

Adding to 10021995 its reverse (59912001), we get a palindrome (69933996).

The spelling of 10021995 in words is "ten million, twenty-one thousand, nine hundred ninety-five".