21019067386 has 8 divisors (see below), whose sum is σ = 31530142080. Its totient is φ = 10509020028.

The previous prime is 21019067371. The next prime is 21019067389. The reversal of 21019067386 is 68376091012.

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

It is not an unprimeable number, because it can be changed into a prime (21019067389) 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, 203466 + ... + 288853.

It is an arithmetic number, because the mean of its divisors is an integer number (3941267760).

Almost surely, 2^21019067386 is an apocalyptic number.

21019067386 is a deficient number, since it is larger than the sum of its proper divisors (10511074694).

21019067386 is a wasteful number, since it uses less digits than its factorization.

21019067386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513668.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 21019067386 in words is "twenty-one billion, nineteen million, sixty-seven thousand, three hundred eighty-six".