21682543816302 has 16 divisors (see below), whose sum is σ = 43367765841360. Its totient is φ = 7227068237312.

The previous prime is 21682543816289. The next prime is 21682543816391. The reversal of 21682543816302 is 20361834528612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111486777 + ... + 111681092.

It is an arithmetic number, because the mean of its divisors is an integer number (2710485365085).

Almost surely, 2^{21682543816302} is an apocalyptic number.

21682543816302 is an abundant number, since it is smaller than the sum of its proper divisors (21685222025058).

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

21682543816302 is a wasteful number, since it uses less digits than its factorization.

21682543816302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223184067.

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 21682543816302 in words is "twenty-one trillion, six hundred eighty-two billion, five hundred forty-three million, eight hundred sixteen thousand, three hundred two".