21302332020 has 48 divisors (see below), whose sum is σ = 66273923520. Its totient is φ = 5680621728.

The previous prime is 21302332003. The next prime is 21302332021. The reversal of 21302332020 is 2023320312.

It is a happy number.

21302332020 is a `hidden beast` number, since 21 + 302 + 3 + 320 + 20 = 666.

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 = 21302331984 and 21302332002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302332021) 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, 19723842 + ... + 19724921.

It is an arithmetic number, because the mean of its divisors is an integer number (1380706740).

Almost surely, 2^21302332020 is an apocalyptic number.

21302332020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302332020 is an abundant number, since it is smaller than the sum of its proper divisors (44971591500).

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

21302332020 is a wasteful number, since it uses less digits than its factorization.

21302332020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39448781 (or 39448773 counting only the distinct ones).

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

Adding to 21302332020 its reverse (2023320312), we get a palindrome (23325652332).

The spelling of 21302332020 in words is "twenty-one billion, three hundred two million, three hundred thirty-two thousand, twenty".