21002310010 has 24 divisors (see below), whose sum is σ = 41553333108. Its totient is φ = 7637203200.

The previous prime is 21002309989. The next prime is 21002310011. The reversal of 21002310010 is 1001320012.

It can be written as a sum of positive squares in 2 ways, for example, as 19310715369 + 1691594641 = 138963^2 + 41129^2 .

It is a super-2 number, since 2×21002310010² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21002310011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8677431 + ... + 8679850.

Almost surely, 2^21002310010 is an apocalyptic number.

21002310010 is a deficient number, since it is larger than the sum of its proper divisors (20551023098).

21002310010 is a wasteful number, since it uses less digits than its factorization.

21002310010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17357310 (or 17357299 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21002310010 its reverse (1001320012), we get a palindrome (22003630022).

The spelling of 21002310010 in words is "twenty-one billion, two million, three hundred ten thousand, ten".