21675318667628 has 48 divisors (see below), whose sum is σ = 39197895819264. Its totient is φ = 10476684726720.

The previous prime is 21675318667609. The next prime is 21675318667643. The reversal of 21675318667628 is 82676681357612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447970325 + ... + 448018707.

It is an arithmetic number, because the mean of its divisors is an integer number (816622829568).

Almost surely, 2^{21675318667628} is an apocalyptic number.

It is an amenable number.

21675318667628 is a deficient number, since it is larger than the sum of its proper divisors (17522577151636).

21675318667628 is a wasteful number, since it uses less digits than its factorization.

21675318667628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52262 (or 52260 counting only the distinct ones).

The product of its digits is 243855360, while the sum is 68.

The spelling of 21675318667628 in words is "twenty-one trillion, six hundred seventy-five billion, three hundred eighteen million, six hundred sixty-seven thousand, six hundred twenty-eight".