21675849312 has 96 divisors (see below), whose sum is σ = 62280701280. Its totient is φ = 6560133120.

The previous prime is 21675849271. The next prime is 21675849331. The reversal of 21675849312 is 21394857612.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 66237 + ... + 218492.

It is an arithmetic number, because the mean of its divisors is an integer number (648757305).

Almost surely, 2^21675849312 is an apocalyptic number.

It is an amenable number.

21675849312 is an abundant number, since it is smaller than the sum of its proper divisors (40604851968).

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

21675849312 is a wasteful number, since it uses less digits than its factorization.

21675849312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284816 (or 284808 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The spelling of 21675849312 in words is "twenty-one billion, six hundred seventy-five million, eight hundred forty-nine thousand, three hundred twelve".