21302323000020 has 72 divisors (see below), whose sum is σ = 66363453114504. Its totient is φ = 5527089209088.

The previous prime is 21302322999989. The next prime is 21302323000051. The reversal of 21302323000020 is 2000032320312.

It is a happy number.

21302323000020 is a `hidden beast` number, since 2 + 130 + 232 + 300 + 0 + 0 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (21302322999989) and next prime (21302323000051).

It can be written as a sum of positive squares in 4 ways, for example, as 4432557572496 + 16869765427524 = 2105364^2 + 4107282^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21302322999957 and 21302323000002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1599266839 + ... + 1599280158.

Almost surely, 2^{21302323000020} is an apocalyptic number.

21302323000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302323000020 is an abundant number, since it is smaller than the sum of its proper divisors (45061130114484).

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

21302323000020 is a wasteful number, since it uses less digits than its factorization.

21302323000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198547049 (or 3198547044 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21302323000020 its reverse (2000032320312), we get a palindrome (23302355320332).

The spelling of 21302323000020 in words is "twenty-one trillion, three hundred two billion, three hundred twenty-three million, twenty", and thus it is an aban number.