21300210020 has 24 divisors (see below), whose sum is σ = 44747299968. Its totient is φ = 8516872800.

The previous prime is 21300209999. The next prime is 21300210023. The reversal of 21300210020 is 2001200312.

It is a happy number.

It is a super-2 number, since 2×21300210020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21300209983 and 21300210010.

It is not an unprimeable number, because it can be changed into a prime (21300210023) 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 7 ways as a sum of consecutive naturals, for example, 145946 + ... + 252785.

It is an arithmetic number, because the mean of its divisors is an integer number (1864470832).

Almost surely, 2^21300210020 is an apocalyptic number.

21300210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21300210020 is an abundant number, since it is smaller than the sum of its proper divisors (23447089948).

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

21300210020 is a wasteful number, since it uses less digits than its factorization.

21300210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401411 (or 401409 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21300210020 its reverse (2001200312), we get a palindrome (23301410332).

The spelling of 21300210020 in words is "twenty-one billion, three hundred million, two hundred ten thousand, twenty".