21667382034672 has 160 divisors (see below), whose sum is σ = 65439615168000. Its totient is φ = 6110659906560.

The previous prime is 21667382034667. The next prime is 21667382034769. The reversal of 21667382034672 is 27643028376612.

It is a super-2 number, since 2×21667382034672² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23661547 + ... + 24560202.

It is an arithmetic number, because the mean of its divisors is an integer number (408997594800).

Almost surely, 2^{21667382034672} is an apocalyptic number.

21667382034672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21667382034672 is an abundant number, since it is smaller than the sum of its proper divisors (43772233133328).

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

21667382034672 is a wasteful number, since it uses less digits than its factorization.

21667382034672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48221831 (or 48221825 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 57.

The spelling of 21667382034672 in words is "twenty-one trillion, six hundred sixty-seven billion, three hundred eighty-two million, thirty-four thousand, six hundred seventy-two".