21033405002 has 4 divisors (see below), whose sum is σ = 31550107506. Its totient is φ = 10516702500.

The previous prime is 21033404999. The next prime is 21033405013. The reversal of 21033405002 is 20050433012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12311899681 + 8721505321 = 110959^2 + 93389^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5258351249 + ... + 5258351252.

Almost surely, 2^21033405002 is an apocalyptic number.

21033405002 is a deficient number, since it is larger than the sum of its proper divisors (10516702504).

21033405002 is a wasteful number, since it uses less digits than its factorization.

21033405002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10516702503.

The product of its (nonzero) digits is 720, while the sum is 20.

Adding to 21033405002 its reverse (20050433012), we get a palindrome (41083838014).

The spelling of 21033405002 in words is "twenty-one billion, thirty-three million, four hundred five thousand, two".