21132230020 has 48 divisors (see below), whose sum is σ = 48437036928. Its totient is φ = 7680476160.

The previous prime is 21132229973. The next prime is 21132230047. The reversal of 21132230020 is 2003223112.

It is a super-2 number, since 2×21132230020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21132229976 and 21132230003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419929 + ... + 467551.

It is an arithmetic number, because the mean of its divisors is an integer number (1009104936).

Almost surely, 2^21132230020 is an apocalyptic number.

21132230020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21132230020 is an abundant number, since it is smaller than the sum of its proper divisors (27304806908).

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

21132230020 is a wasteful number, since it uses less digits than its factorization.

21132230020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49660 (or 49658 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21132230020 its reverse (2003223112), we get a palindrome (23135453132).

It can be divided in two parts, 21132 and 230020, that added together give a palindrome (251152).

The spelling of 21132230020 in words is "twenty-one billion, one hundred thirty-two million, two hundred thirty thousand, twenty".