21067012389 has 8 divisors (see below), whose sum is σ = 28099814400. Its totient is φ = 14039442656.

The previous prime is 21067012367. The next prime is 21067012409. The reversal of 21067012389 is 98321076012.

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 21067012389 - 2⁸ = 21067012133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21067012789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1298664 + ... + 1314785.

It is an arithmetic number, because the mean of its divisors is an integer number (3512476800).

Almost surely, 2^21067012389 is an apocalyptic number.

It is an amenable number.

21067012389 is a deficient number, since it is larger than the sum of its proper divisors (7032802011).

21067012389 is a wasteful number, since it uses less digits than its factorization.

21067012389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616139.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 21067012389 in words is "twenty-one billion, sixty-seven million, twelve thousand, three hundred eighty-nine".