21233103320 has 64 divisors (see below), whose sum is σ = 56126679840. Its totient is φ = 7127193600.

The previous prime is 21233103293. The next prime is 21233103341. The reversal of 21233103320 is 2330133212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21233103292 and 21233103301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1850321 + ... + 1861760.

Almost surely, 2^21233103320 is an apocalyptic number.

21233103320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233103320 is an abundant number, since it is smaller than the sum of its proper divisors (34893576520).

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

21233103320 is a wasteful number, since it uses less digits than its factorization.

21233103320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712116 (or 3712112 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21233103320 its reverse (2330133212), we get a palindrome (23563236532).

The spelling of 21233103320 in words is "twenty-one billion, two hundred thirty-three million, one hundred three thousand, three hundred twenty".