21330502242 has 64 divisors (see below), whose sum is σ = 51849227520. Its totient is φ = 5710841856.

The previous prime is 21330502187. The next prime is 21330502267. The reversal of 21330502242 is 24220503312.

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, 98278 + ... + 228734.

It is an arithmetic number, because the mean of its divisors is an integer number (810144180).

Almost surely, 2^21330502242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21330502242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25924613760).

21330502242 is an abundant number, since it is smaller than the sum of its proper divisors (30518725278).

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

21330502242 is a wasteful number, since it uses less digits than its factorization.

21330502242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130715.

The product of its (nonzero) digits is 2880, while the sum is 24.

The spelling of 21330502242 in words is "twenty-one billion, three hundred thirty million, five hundred two thousand, two hundred forty-two".