20021002010 has 8 divisors (see below), whose sum is σ = 36037803636. Its totient is φ = 8008400800.

The previous prime is 20021001997. The next prime is 20021002019. The reversal of 20021002010 is 1020012002.

It can be written as a sum of positive squares in 2 ways, for example, as 20013477961 + 7524049 = 141469^2 + 2743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20021002019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001050091 + ... + 1001050110.

Almost surely, 2^20021002010 is an apocalyptic number.

20021002010 is a deficient number, since it is larger than the sum of its proper divisors (16016801626).

20021002010 is a wasteful number, since it uses less digits than its factorization.

20021002010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002100208.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20021002010 its reverse (1020012002), we get a palindrome (21041014012).

The spelling of 20021002010 in words is "twenty billion, twenty-one million, two thousand, ten".