21401330132 has 48 divisors (see below), whose sum is σ = 46146051840. Its totient is φ = 8457115392.

The previous prime is 21401330051. The next prime is 21401330149. The reversal of 21401330132 is 23103310412.

It is a super-2 number, since 2×21401330132² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302528 + ... + 366504.

It is an arithmetic number, because the mean of its divisors is an integer number (961376080).

Almost surely, 2^21401330132 is an apocalyptic number.

It is an amenable number.

21401330132 is an abundant number, since it is smaller than the sum of its proper divisors (24744721708).

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

21401330132 is a wasteful number, since it uses less digits than its factorization.

21401330132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64920 (or 64918 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21401330132 its reverse (23103310412), we get a palindrome (44504640544).

The spelling of 21401330132 in words is "twenty-one billion, four hundred one million, three hundred thirty thousand, one hundred thirty-two".