21330214642492 has 72 divisors (see below), whose sum is σ = 43605661121568. Its totient is φ = 9102961123200.

The previous prime is 21330214642439. The next prime is 21330214642493. The reversal of 21330214642492 is 29424641203312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330214642493) 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, 60597642 + ... + 60948622.

It is an arithmetic number, because the mean of its divisors is an integer number (605634182244).

Almost surely, 2^{21330214642492} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21330214642492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21802830560784).

21330214642492 is an abundant number, since it is smaller than the sum of its proper divisors (22275446479076).

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

21330214642492 is a wasteful number, since it uses less digits than its factorization.

21330214642492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352307 (or 352298 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 21330214642492 in words is "twenty-one trillion, three hundred thirty billion, two hundred fourteen million, six hundred forty-two thousand, four hundred ninety-two".