10020644 has 6 divisors (see below), whose sum is σ = 17536134. Its totient is φ = 5010320.

The previous prime is 10020643. The next prime is 10020691. The reversal of 10020644 is 44602001.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 3467044 = 2560^2 + 1862^2 .

It is not an unprimeable number, because it can be changed into a prime (10020641) 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 as a sum of consecutive naturals, namely, 1252577 + ... + 1252584.

It is an arithmetic number, because the mean of its divisors is an integer number (2922689).

Almost surely, 2^10020644 is an apocalyptic number.

It is an amenable number.

10020644 is a deficient number, since it is larger than the sum of its proper divisors (7515490).

10020644 is a wasteful number, since it uses less digits than its factorization.

10020644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505165 (or 2505163 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 10020644 is about 3165.5400803023. The cubic root of 10020644 is about 215.5916209341.

Adding to 10020644 its reverse (44602001), we get a palindrome (54622645).

The spelling of 10020644 in words is "ten million, twenty thousand, six hundred forty-four".