21702216687350 has 12 divisors (see below), whose sum is σ = 40366123038564. Its totient is φ = 8680886674920.

The previous prime is 21702216687331. The next prime is 21702216687377. The reversal of 21702216687350 is 5378661220712.

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 434044333747 = 21702216687350 / (2 + 1 + 7 + 0 + 2 + 2 + 1 + 6 + 6 + 8 + 7 + 3 + 5 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217022166824 + ... + 217022166923.

It is an arithmetic number, because the mean of its divisors is an integer number (3363843586547).

Almost surely, 2^{21702216687350} is an apocalyptic number.

21702216687350 is a deficient number, since it is larger than the sum of its proper divisors (18663906351214).

21702216687350 is a wasteful number, since it uses less digits than its factorization.

21702216687350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434044333759 (or 434044333754 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 21702216687350 in words is "twenty-one trillion, seven hundred two billion, two hundred sixteen million, six hundred eighty-seven thousand, three hundred fifty".