21333424402 has 8 divisors (see below), whose sum is σ = 32001313212. Its totient is φ = 10666320000.

The previous prime is 21333424397. The next prime is 21333424403. The reversal of 21333424402 is 20442433312.

It can be written as a sum of positive squares in 2 ways, for example, as 21105987841 + 227436561 = 145279^2 + 15081^2 .

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

It is a super-2 number, since 2×21333424402² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21333424403) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 122599 + ... + 240202.

Almost surely, 2^21333424402 is an apocalyptic number.

21333424402 is a deficient number, since it is larger than the sum of its proper divisors (10667888810).

21333424402 is a wasteful number, since it uses less digits than its factorization.

21333424402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392204.

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21333424402 its reverse (20442433312), we get a palindrome (41775857714).

The spelling of 21333424402 in words is "twenty-one billion, three hundred thirty-three million, four hundred twenty-four thousand, four hundred two".