21477320367064 has 32 divisors (see below), whose sum is σ = 40298661216000. Its totient is φ = 10731012970912.

The previous prime is 21477320367059. The next prime is 21477320367079. The reversal of 21477320367064 is 46076302377412.

It is a super-2 number, since 2×21477320367064² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 77739717 + ... + 78015499.

It is an arithmetic number, because the mean of its divisors is an integer number (1259333163000).

Almost surely, 2^{21477320367064} is an apocalyptic number.

It is an amenable number.

21477320367064 is a deficient number, since it is larger than the sum of its proper divisors (18821340848936).

21477320367064 is a wasteful number, since it uses less digits than its factorization.

21477320367064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282687 (or 282683 counting only the distinct ones).

The product of its (nonzero) digits is 7112448, while the sum is 52.

The spelling of 21477320367064 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred twenty million, three hundred sixty-seven thousand, sixty-four".