21470552256366 has 24 divisors (see below), whose sum is σ = 47776814481864. Its totient is φ = 6963422353200.

The previous prime is 21470552256359. The next prime is 21470552256367. The reversal of 21470552256366 is 66365225507412.

21470552256366 is a `hidden beast` number, since 2 + 1 + 4 + 7 + 0 + 5 + 522 + 56 + 3 + 66 = 666.

It is a super-2 number, since 2×21470552256366² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470552256367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16119032560 + ... + 16119033891.

It is an arithmetic number, because the mean of its divisors is an integer number (1990700603411).

Almost surely, 2^{21470552256366} is an apocalyptic number.

21470552256366 is an abundant number, since it is smaller than the sum of its proper divisors (26306262225498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21470552256366 is a wasteful number, since it uses less digits than its factorization.

21470552256366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32238066496 (or 32238066493 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 54.

The spelling of 21470552256366 in words is "twenty-one trillion, four hundred seventy billion, five hundred fifty-two million, two hundred fifty-six thousand, three hundred sixty-six".