21200165155248 has 40 divisors (see below), whose sum is σ = 57988687044528. Its totient is φ = 6651032205312.

The previous prime is 21200165155193. The next prime is 21200165155259. The reversal of 21200165155248 is 84255156100212.

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, 12990296461 + ... + 12990298092.

Almost surely, 2^{21200165155248} is an apocalyptic number.

It is an amenable number.

21200165155248 is an abundant number, since it is smaller than the sum of its proper divisors (36788521889280).

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

21200165155248 is a wasteful number, since it uses less digits than its factorization.

21200165155248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25980594581 (or 25980594575 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 42.

The spelling of 21200165155248 in words is "twenty-one trillion, two hundred billion, one hundred sixty-five million, one hundred fifty-five thousand, two hundred forty-eight".