21067179632 has 20 divisors (see below), whose sum is σ = 42965959080. Its totient is φ = 9979190208.

The previous prime is 21067179631. The next prime is 21067179701. The reversal of 21067179632 is 23697176012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21067179631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 34649663 + ... + 34650270.

It is an arithmetic number, because the mean of its divisors is an integer number (2148297954).

Almost surely, 2^21067179632 is an apocalyptic number.

It is an amenable number.

21067179632 is an abundant number, since it is smaller than the sum of its proper divisors (21898779448).

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

21067179632 is a wasteful number, since it uses less digits than its factorization.

21067179632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69299960 (or 69299954 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 21067179632 in words is "twenty-one billion, sixty-seven million, one hundred seventy-nine thousand, six hundred thirty-two".