21302021204 has 12 divisors (see below), whose sum is σ = 37324508928. Its totient is φ = 10637875800.

The previous prime is 21302021203. The next prime is 21302021233. The reversal of 21302021204 is 40212020312.

It is a super-2 number, since 2×21302021204² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302021203) 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, 3280052 + ... + 3286539.

It is an arithmetic number, because the mean of its divisors is an integer number (3110375744).

Almost surely, 2^21302021204 is an apocalyptic number.

It is an amenable number.

21302021204 is a deficient number, since it is larger than the sum of its proper divisors (16022487724).

21302021204 is a wasteful number, since it uses less digits than its factorization.

21302021204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6567406 (or 6567404 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21302021204 its reverse (40212020312), we get a palindrome (61514041516).

The spelling of 21302021204 in words is "twenty-one billion, three hundred two million, twenty-one thousand, two hundred four".