21002434010 has 16 divisors (see below), whose sum is σ = 38157695136. Its totient is φ = 8322459408.

The previous prime is 21002434003. The next prime is 21002434021. The reversal of 21002434010 is 1043420012.

It is a super-2 number, since 2×21002434010² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21002434010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9813152 + ... + 9815291.

It is an arithmetic number, because the mean of its divisors is an integer number (2384855946).

Almost surely, 2^21002434010 is an apocalyptic number.

21002434010 is a deficient number, since it is larger than the sum of its proper divisors (17155261126).

21002434010 is a wasteful number, since it uses less digits than its factorization.

21002434010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19628557.

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

Adding to 21002434010 its reverse (1043420012), we get a palindrome (22045854022).

The spelling of 21002434010 in words is "twenty-one billion, two million, four hundred thirty-four thousand, ten".