21404132000 has 96 divisors (see below), whose sum is σ = 53873046864. Its totient is φ = 8352768000.

The previous prime is 21404131909. The next prime is 21404132003. The reversal of 21404132000 is 23140412.

It can be written as a sum of positive squares in 8 ways, for example, as 7463824 + 21396668176 = 2732^2 + 146276^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21404132000.

It is not an unprimeable number, because it can be changed into a prime (21404132003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98744 + ... + 229256.

Almost surely, 2^21404132000 is an apocalyptic number.

21404132000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21404132000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26936523432).

21404132000 is an abundant number, since it is smaller than the sum of its proper divisors (32468914864).

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

21404132000 is a wasteful number, since it uses less digits than its factorization.

21404132000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130579 (or 130561 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21404132000 its reverse (23140412), we get a palindrome (21427272412).

The spelling of 21404132000 in words is "twenty-one billion, four hundred four million, one hundred thirty-two thousand".