21301132032 has 72 divisors (see below), whose sum is σ = 62991215280. Its totient is φ = 7100375040.

The previous prime is 21301132007. The next prime is 21301132037. The reversal of 21301132032 is 23023110312.

It is a tau number, because it is divible by the number of its divisors (72).

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 = 21301131996 and 21301132014.

It is not an unprimeable number, because it can be changed into a prime (21301132037) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1533969 + ... + 1547792.

It is an arithmetic number, because the mean of its divisors is an integer number (874877990).

Almost surely, 2^21301132032 is an apocalyptic number.

It is an amenable number.

21301132032 is an abundant number, since it is smaller than the sum of its proper divisors (41690083248).

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

21301132032 is an equidigital number, since it uses as much as digits as its factorization.

21301132032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081786 (or 3081766 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21301132032 its reverse (23023110312), we get a palindrome (44324242344).

The spelling of 21301132032 in words is "twenty-one billion, three hundred one million, one hundred thirty-two thousand, thirty-two".