21033320302 has 16 divisors (see below), whose sum is σ = 33217113600. Its totient is φ = 9961169400.

The previous prime is 21033320281. The next prime is 21033320317. The reversal of 21033320302 is 20302333012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21033320302.

It is a congruent number.

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, 148177 + ... + 253027.

It is an arithmetic number, because the mean of its divisors is an integer number (2076069600).

Almost surely, 2^21033320302 is an apocalyptic number.

21033320302 is a deficient number, since it is larger than the sum of its proper divisors (12183793298).

21033320302 is a wasteful number, since it uses less digits than its factorization.

21033320302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110151.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21033320302 its reverse (20302333012), we get a palindrome (41335653314).

The spelling of 21033320302 in words is "twenty-one billion, thirty-three million, three hundred twenty thousand, three hundred two".