21300045432 has 64 divisors (see below), whose sum is σ = 54617172480. Its totient is φ = 6919041792.

The previous prime is 21300045427. The next prime is 21300045469. The reversal of 21300045432 is 23454000312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 222303 + ... + 303345.

It is an arithmetic number, because the mean of its divisors is an integer number (853393320).

Almost surely, 2^21300045432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21300045432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27308586240).

21300045432 is an abundant number, since it is smaller than the sum of its proper divisors (33317127048).

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

21300045432 is a wasteful number, since it uses less digits than its factorization.

21300045432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81332 (or 81328 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 21300045432 its reverse (23454000312), we get a palindrome (44754045744).

The spelling of 21300045432 in words is "twenty-one billion, three hundred million, forty-five thousand, four hundred thirty-two".