21301417632 has 48 divisors (see below), whose sum is σ = 60999517152. Its totient is φ = 6454974720.

The previous prime is 21301417609. The next prime is 21301417637. The reversal of 21301417632 is 23671410312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 21301417632.

It is not an unprimeable number, because it can be changed into a prime (21301417637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10084843 + ... + 10086954.

It is an arithmetic number, because the mean of its divisors is an integer number (1270823274).

Almost surely, 2^21301417632 is an apocalyptic number.

21301417632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21301417632 is an abundant number, since it is smaller than the sum of its proper divisors (39698099520).

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

21301417632 is a wasteful number, since it uses less digits than its factorization.

21301417632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20171821 (or 20171813 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

Adding to 21301417632 its reverse (23671410312), we get a palindrome (44972827944).

The spelling of 21301417632 in words is "twenty-one billion, three hundred one million, four hundred seventeen thousand, six hundred thirty-two".