21424702117716 has 72 divisors (see below), whose sum is σ = 54471622593024. Its totient is φ = 7100106485760.

The previous prime is 21424702117711. The next prime is 21424702117739. The reversal of 21424702117716 is 61771120742412.

21424702117716 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 470 + 2 + 1 + 177 + 1 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424702117711) 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 23 ways as a sum of consecutive naturals, for example, 11120596 + ... + 12904148.

It is an arithmetic number, because the mean of its divisors is an integer number (756550313792).

Almost surely, 2^{21424702117716} is an apocalyptic number.

It is an amenable number.

21424702117716 is an abundant number, since it is smaller than the sum of its proper divisors (33046920475308).

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

21424702117716 is a wasteful number, since it uses less digits than its factorization.

21424702117716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785501 (or 1785496 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The spelling of 21424702117716 in words is "twenty-one trillion, four hundred twenty-four billion, seven hundred two million, one hundred seventeen thousand, seven hundred sixteen".