21133430402 has 24 divisors (see below), whose sum is σ = 37775093580. Its totient is φ = 8836275840.

The previous prime is 21133430399. The next prime is 21133430407. The reversal of 21133430402 is 20403433112.

It can be written as a sum of positive squares in 2 ways, for example, as 14156002441 + 6977427961 = 118979^2 + 83531^2 .

It is not an unprimeable number, because it can be changed into a prime (21133430407) 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 11 ways as a sum of consecutive naturals, for example, 2625827 + ... + 2633862.

Almost surely, 2^21133430402 is an apocalyptic number.

21133430402 is a deficient number, since it is larger than the sum of its proper divisors (16641663178).

21133430402 is a wasteful number, since it uses less digits than its factorization.

21133430402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5259746 (or 5259739 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21133430402 its reverse (20403433112), we get a palindrome (41536863514).

The spelling of 21133430402 in words is "twenty-one billion, one hundred thirty-three million, four hundred thirty thousand, four hundred two".