21067552073 has 8 divisors (see below), whose sum is σ = 22323755520. Its totient is φ = 19813230400.

The previous prime is 21067552069. The next prime is 21067552081. The reversal of 21067552073 is 37025576012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21067552073 - 2² = 21067552069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21067552003) 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 7 ways as a sum of consecutive naturals, for example, 447353 + ... + 492198.

It is an arithmetic number, because the mean of its divisors is an integer number (2790469440).

Almost surely, 2^21067552073 is an apocalyptic number.

It is an amenable number.

21067552073 is a deficient number, since it is larger than the sum of its proper divisors (1256203447).

21067552073 is a wasteful number, since it uses less digits than its factorization.

21067552073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940887.

The product of its (nonzero) digits is 88200, while the sum is 38.

The spelling of 21067552073 in words is "twenty-one billion, sixty-seven million, five hundred fifty-two thousand, seventy-three".