21501335002 has 8 divisors (see below), whose sum is σ = 36859431456. Its totient is φ = 9214857852.

The previous prime is 21501334999. The next prime is 21501335017. The reversal of 21501335002 is 20053310512.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767904808 + ... + 767904835.

It is an arithmetic number, because the mean of its divisors is an integer number (4607428932).

Almost surely, 2^21501335002 is an apocalyptic number.

21501335002 is a deficient number, since it is larger than the sum of its proper divisors (15358096454).

21501335002 is a wasteful number, since it uses less digits than its factorization.

21501335002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535809652.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 21501335002 its reverse (20053310512), we get a palindrome (41554645514).

The spelling of 21501335002 in words is "twenty-one billion, five hundred one million, three hundred thirty-five thousand, two".