20001010 has 32 divisors (see below), whose sum is σ = 39443760. Its totient is φ = 7268352.

The previous prime is 20001001. The next prime is 20001019. The reversal of 20001010 is 1010002.

It is an interprime number because it is at equal distance from previous prime (20001001) and next prime (20001019).

It can be written as a sum of positive squares in 8 ways, for example, as 11895601 + 8105409 = 3449^2 + 2847^2 .

It is not an unprimeable number, because it can be changed into a prime (20001019) 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, 2902 + ... + 6958.

Almost surely, 2^20001010 is an apocalyptic number.

20001010 is a deficient number, since it is larger than the sum of its proper divisors (19442750).

20001010 is a wasteful number, since it uses less digits than its factorization.

20001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110.

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 20001010 is about 4472.2488750068. The cubic root of 20001010 is about 271.4463308522.

Adding to 20001010 its reverse (1010002), we get a palindrome (21011012).

The spelling of 20001010 in words is "twenty million, one thousand, ten".