10020999 has 16 divisors (see below), whose sum is σ = 14132480. Its totient is φ = 6316056.

The previous prime is 10020977. The next prime is 10021001. The reversal of 10020999 is 99902001.

It is not a de Polignac number, because 10020999 - 2⁸ = 10020743 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 (10020949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20334 + ... + 20820.

It is an arithmetic number, because the mean of its divisors is an integer number (883280).

Almost surely, 2^10020999 is an apocalyptic number.

10020999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10020999 is a deficient number, since it is larger than the sum of its proper divisors (4111481).

10020999 is an frugal number, since it uses more digits than its factorization.

10020999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 10020999 is about 3165.5961523858. The cubic root of 10020999 is about 215.5941668158.

The spelling of 10020999 in words is "ten million, twenty thousand, nine hundred ninety-nine".