21305510002 has 16 divisors (see below), whose sum is σ = 36565398720. Its totient is φ = 9120516048.

The previous prime is 21305509999. The next prime is 21305510047. The reversal of 21305510002 is 20001550312.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 855352 + ... + 879907.

It is an arithmetic number, because the mean of its divisors is an integer number (2285337420).

Almost surely, 2^21305510002 is an apocalyptic number.

21305510002 is a deficient number, since it is larger than the sum of its proper divisors (15259888718).

21305510002 is a wasteful number, since it uses less digits than its factorization.

21305510002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736145.

The product of its (nonzero) digits is 300, while the sum is 19.

The spelling of 21305510002 in words is "twenty-one billion, three hundred five million, five hundred ten thousand, two".