21150543000 has 128 divisors (see below), whose sum is σ = 66069432000. Its totient is φ = 5633331200.

The previous prime is 21150542981. The next prime is 21150543031. The reversal of 21150543000 is 34505112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2783206 + ... + 2790794.

Almost surely, 2^21150543000 is an apocalyptic number.

21150543000 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 21150543000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33034716000).

21150543000 is an abundant number, since it is smaller than the sum of its proper divisors (44918889000).

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

21150543000 is a wasteful number, since it uses less digits than its factorization.

21150543000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8542 (or 8528 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The spelling of 21150543000 in words is "twenty-one billion, one hundred fifty million, five hundred forty-three thousand".