21304410432 has 28 divisors (see below), whose sum is σ = 56367919776. Its totient is φ = 7101470080.

The previous prime is 21304410419. The next prime is 21304410437. The reversal of 21304410432 is 23401440312.

It is a super-2 number, since 2×21304410432² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304410437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55480044 + ... + 55480427.

It is an arithmetic number, because the mean of its divisors is an integer number (2013139992).

Almost surely, 2^21304410432 is an apocalyptic number.

It is an amenable number.

21304410432 is an abundant number, since it is smaller than the sum of its proper divisors (35063509344).

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

21304410432 is a wasteful number, since it uses less digits than its factorization.

21304410432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110960486 (or 110960476 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21304410432 its reverse (23401440312), we get a palindrome (44705850744).

The spelling of 21304410432 in words is "twenty-one billion, three hundred four million, four hundred ten thousand, four hundred thirty-two".