21064087412 has 12 divisors (see below), whose sum is σ = 37152407040. Its totient is φ = 10449113976.

The previous prime is 21064087411. The next prime is 21064087441. The reversal of 21064087412 is 21478046012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21064087411) 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, 20731862 + ... + 20732877.

It is an arithmetic number, because the mean of its divisors is an integer number (3096033920).

Almost surely, 2^21064087412 is an apocalyptic number.

It is an amenable number.

21064087412 is a deficient number, since it is larger than the sum of its proper divisors (16088319628).

21064087412 is a wasteful number, since it uses less digits than its factorization.

21064087412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41464870 (or 41464868 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The spelling of 21064087412 in words is "twenty-one billion, sixty-four million, eighty-seven thousand, four hundred twelve".