21302233402 has 16 divisors (see below), whose sum is σ = 32318742024. Its totient is φ = 10529640000.

The previous prime is 21302233399. The next prime is 21302233409. The reversal of 21302233402 is 20433220312.

It can be written as a sum of positive squares in 4 ways, for example, as 21281266161 + 20967241 = 145881^2 + 4579^2 .

It is not an unprimeable number, because it can be changed into a prime (21302233409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53752 + ... + 213292.

Almost surely, 2^21302233402 is an apocalyptic number.

21302233402 is a deficient number, since it is larger than the sum of its proper divisors (11016508622).

21302233402 is a wasteful number, since it uses less digits than its factorization.

21302233402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160305.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 21302233402 its reverse (20433220312), we get a palindrome (41735453714).

The spelling of 21302233402 in words is "twenty-one billion, three hundred two million, two hundred thirty-three thousand, four hundred two".