21942724230 has 160 divisors (see below), whose sum is σ = 67614877440. Its totient is φ = 5001756480.

The previous prime is 21942724229. The next prime is 21942724337. The reversal of 21942724230 is 3242724912.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2143825 + ... + 2154035.

It is an arithmetic number, because the mean of its divisors is an integer number (422592984).

Almost surely, 2^21942724230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21942724230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33807438720).

21942724230 is an abundant number, since it is smaller than the sum of its proper divisors (45672153210).

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

21942724230 is a wasteful number, since it uses less digits than its factorization.

21942724230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10616 (or 10607 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 21942724230 in words is "twenty-one billion, nine hundred forty-two million, seven hundred twenty-four thousand, two hundred thirty".