21000582132 has 24 divisors (see below), whose sum is σ = 49174515936. Its totient is φ = 6975457248.

The previous prime is 21000582091. The next prime is 21000582139. The reversal of 21000582132 is 23128500012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000582139) 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, 3088563 + ... + 3095354.

It is an arithmetic number, because the mean of its divisors is an integer number (2048938164).

Almost surely, 2^21000582132 is an apocalyptic number.

It is an amenable number.

21000582132 is an abundant number, since it is smaller than the sum of its proper divisors (28173933804).

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

21000582132 is a wasteful number, since it uses less digits than its factorization.

21000582132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6184207 (or 6184205 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 21000582132 in words is "twenty-one billion, five hundred eighty-two thousand, one hundred thirty-two".