21323303124 has 48 divisors (see below), whose sum is σ = 51008952960. Its totient is φ = 6928821760.

The previous prime is 21323303101. The next prime is 21323303129. The reversal of 21323303124 is 42130332312.

It is a super-2 number, since 2×21323303124² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21323303094 and 21323303103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323303129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 617377 + ... + 650999.

It is an arithmetic number, because the mean of its divisors is an integer number (1062686520).

Almost surely, 2^21323303124 is an apocalyptic number.

It is an amenable number.

21323303124 is an abundant number, since it is smaller than the sum of its proper divisors (29685649836).

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

21323303124 is a wasteful number, since it uses less digits than its factorization.

21323303124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34960 (or 34958 counting only the distinct ones).

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

Adding to 21323303124 its reverse (42130332312), we get a palindrome (63453635436).

The spelling of 21323303124 in words is "twenty-one billion, three hundred twenty-three million, three hundred three thousand, one hundred twenty-four".