21334013420 has 24 divisors (see below), whose sum is σ = 44829134448. Its totient is φ = 8528328000.

The previous prime is 21334013417. The next prime is 21334013443. The reversal of 21334013420 is 2431043312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296606 + ... + 361445.

It is an arithmetic number, because the mean of its divisors is an integer number (1867880602).

Almost surely, 2^21334013420 is an apocalyptic number.

21334013420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21334013420 is an abundant number, since it is smaller than the sum of its proper divisors (23495121028).

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

21334013420 is a wasteful number, since it uses less digits than its factorization.

21334013420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659681 (or 659679 counting only the distinct ones).

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

Adding to 21334013420 its reverse (2431043312), we get a palindrome (23765056732).

The spelling of 21334013420 in words is "twenty-one billion, three hundred thirty-four million, thirteen thousand, four hundred twenty".