21300002022 has 64 divisors (see below), whose sum is σ = 48323520000. Its totient is φ = 6204791808.

The previous prime is 21300001993. The next prime is 21300002029. The reversal of 21300002022 is 22020000312.

It is a super-2 number, since 2×21300002022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21300001989 and 21300002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21300002029) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2780854 + ... + 2788502.

It is an arithmetic number, because the mean of its divisors is an integer number (755055000).

Almost surely, 2^21300002022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21300002022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24161760000).

21300002022 is an abundant number, since it is smaller than the sum of its proper divisors (27023517978).

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

21300002022 is a wasteful number, since it uses less digits than its factorization.

21300002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9565.

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

Adding to 21300002022 its reverse (22020000312), we get a palindrome (43320002334).

The spelling of 21300002022 in words is "twenty-one billion, three hundred million, two thousand, twenty-two".