21020002010 has 16 divisors (see below), whose sum is σ = 43241147136. Its totient is φ = 7206857808.

The previous prime is 21020002001. The next prime is 21020002063. The reversal of 21020002010 is 1020002012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150142802 + ... + 150142941.

It is an arithmetic number, because the mean of its divisors is an integer number (2702571696).

Almost surely, 2^21020002010 is an apocalyptic number.

21020002010 is an abundant number, since it is smaller than the sum of its proper divisors (22221145126).

21020002010 is a wasteful number, since it uses less digits than its factorization.

21020002010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300285757.

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

Adding to 21020002010 its reverse (1020002012), we get a palindrome (22040004022).

The spelling of 21020002010 in words is "twenty-one billion, twenty million, two thousand, ten".