21233134320 has 80 divisors (see below), whose sum is σ = 66163911072. Its totient is φ = 5632819200.

The previous prime is 21233134301. The next prime is 21233134333. The reversal of 21233134320 is 2343133212.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182881 + ... + 275520.

Almost surely, 2^21233134320 is an apocalyptic number.

21233134320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233134320 is an abundant number, since it is smaller than the sum of its proper divisors (44930776752).

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

21233134320 is a wasteful number, since it uses less digits than its factorization.

21233134320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458610 (or 458604 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21233134320 its reverse (2343133212), we get a palindrome (23576267532).

The spelling of 21233134320 in words is "twenty-one billion, two hundred thirty-three million, one hundred thirty-four thousand, three hundred twenty".