21320133304 has 8 divisors (see below), whose sum is σ = 39975249960. Its totient is φ = 10660066648.

The previous prime is 21320133293. The next prime is 21320133311. The reversal of 21320133304 is 40333102312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332508324 + ... + 1332508339.

It is an arithmetic number, because the mean of its divisors is an integer number (4996906245).

Almost surely, 2^21320133304 is an apocalyptic number.

It is an amenable number.

21320133304 is a deficient number, since it is larger than the sum of its proper divisors (18655116656).

21320133304 is a wasteful number, since it uses less digits than its factorization.

21320133304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665016669 (or 2665016665 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21320133304 its reverse (40333102312), we get a palindrome (61653235616).

The spelling of 21320133304 in words is "twenty-one billion, three hundred twenty million, one hundred thirty-three thousand, three hundred four".