21651674000 has 80 divisors (see below), whose sum is σ = 57113237376. Its totient is φ = 7873328000.

The previous prime is 21651673997. The next prime is 21651674027. The reversal of 21651674000 is 47615612.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470084 + ... + 514083.

Almost surely, 2^21651674000 is an apocalyptic number.

21651674000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21651674000 is an abundant number, since it is smaller than the sum of its proper divisors (35461563376).

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

21651674000 is a wasteful number, since it uses less digits than its factorization.

21651674000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984201 (or 984185 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 21651674000 in words is "twenty-one billion, six hundred fifty-one million, six hundred seventy-four thousand".