21365025463216 has 20 divisors (see below), whose sum is σ = 41436507538624. Its totient is φ = 10671733195200.

The previous prime is 21365025463181. The next prime is 21365025463219. The reversal of 21365025463216 is 61236452056312.

It is not an unprimeable number, because it can be changed into a prime (21365025463219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673704675 + ... + 673736386.

Almost surely, 2^{21365025463216} is an apocalyptic number.

It is an amenable number.

21365025463216 is a deficient number, since it is larger than the sum of its proper divisors (20071482075408).

21365025463216 is a wasteful number, since it uses less digits than its factorization.

21365025463216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347442060 (or 1347442054 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 21365025463216 in words is "twenty-one trillion, three hundred sixty-five billion, twenty-five million, four hundred sixty-three thousand, two hundred sixteen".