21523132000 has 96 divisors (see below), whose sum is σ = 53054374464. Its totient is φ = 8581248000.

The previous prime is 21523131997. The next prime is 21523132021. The reversal of 21523132000 is 23132512.

It is a super-2 number, since 2×21523132000² (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, 1243405 + ... + 1260595.

It is an arithmetic number, because the mean of its divisors is an integer number (552649734).

Almost surely, 2^21523132000 is an apocalyptic number.

21523132000 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 21523132000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26527187232).

21523132000 is an abundant number, since it is smaller than the sum of its proper divisors (31531242464).

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

21523132000 is a wasteful number, since it uses less digits than its factorization.

21523132000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17529 (or 17511 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

Adding to 21523132000 its reverse (23132512), we get a palindrome (21546264512).

The spelling of 21523132000 in words is "twenty-one billion, five hundred twenty-three million, one hundred thirty-two thousand".