21300022020 has 48 divisors (see below), whose sum is σ = 59685228288. Its totient is φ = 5675704320.

The previous prime is 21300022001. The next prime is 21300022031. The reversal of 21300022020 is 2022000312.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 21300021987 and 21300022005.

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, 54141 + ... + 213380.

It is an arithmetic number, because the mean of its divisors is an integer number (1243442256).

Almost surely, 2^21300022020 is an apocalyptic number.

21300022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300022020 is an abundant number, since it is smaller than the sum of its proper divisors (38385206268).

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

21300022020 is a wasteful number, since it uses less digits than its factorization.

21300022020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268860 (or 268858 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21300022020 its reverse (2022000312), we get a palindrome (23322022332).

The spelling of 21300022020 in words is "twenty-one billion, three hundred million, twenty-two thousand, twenty".