21302434320 has 40 divisors (see below), whose sum is σ = 66037547136. Its totient is φ = 5680649088.

The previous prime is 21302434249. The next prime is 21302434333. The reversal of 21302434320 is 2343420312.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 44379832 + ... + 44380311.

Almost surely, 2^21302434320 is an apocalyptic number.

21302434320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302434320 is an abundant number, since it is smaller than the sum of its proper divisors (44735112816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21302434320 is a wasteful number, since it uses less digits than its factorization.

21302434320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88760159 (or 88760153 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21302434320 its reverse (2343420312), we get a palindrome (23645854632).

The spelling of 21302434320 in words is "twenty-one billion, three hundred two million, four hundred thirty-four thousand, three hundred twenty".