21132075700 has 72 divisors (see below), whose sum is σ = 47882435328. Its totient is φ = 8079899520.

The previous prime is 21132075689. The next prime is 21132075707. The reversal of 21132075700 is 757023112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132075707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5847094 + ... + 5850706.

It is an arithmetic number, because the mean of its divisors is an integer number (665033824).

Almost surely, 2^21132075700 is an apocalyptic number.

21132075700 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 21132075700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23941217664).

21132075700 is an abundant number, since it is smaller than the sum of its proper divisors (26750359628).

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

21132075700 is a wasteful number, since it uses less digits than its factorization.

21132075700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193 (or 6186 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

Adding to 21132075700 its reverse (757023112), we get a palindrome (21889098812).

The spelling of 21132075700 in words is "twenty-one billion, one hundred thirty-two million, seventy-five thousand, seven hundred".