21670317486 has 48 divisors (see below), whose sum is σ = 49726074528. Its totient is φ = 6796915200.

The previous prime is 21670317451. The next prime is 21670317497. The reversal of 21670317486 is 68471307612.

21670317486 is a `hidden beast` number, since 2 + 167 + 0 + 3 + 1 + 7 + 486 = 666.

21670317486 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 2538906 + ... + 2547426.

It is an arithmetic number, because the mean of its divisors is an integer number (1035959886).

Almost surely, 2^21670317486 is an apocalyptic number.

21670317486 is an abundant number, since it is smaller than the sum of its proper divisors (28055757042).

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

21670317486 is a wasteful number, since it uses less digits than its factorization.

21670317486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16857 (or 16854 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 21670317486 in words is "twenty-one billion, six hundred seventy million, three hundred seventeen thousand, four hundred eighty-six".