21716340715 has 16 divisors (see below), whose sum is σ = 26977056480. Its totient is φ = 16762278400.

The previous prime is 21716340641. The next prime is 21716340749. The reversal of 21716340715 is 51704361712.

It is not a de Polignac number, because 21716340715 - 2¹⁹ = 21715816427 is a prime.

It is a super-2 number, since 2×21716340715² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 158787 + ... + 262003.

It is an arithmetic number, because the mean of its divisors is an integer number (1686066030).

Almost surely, 2^21716340715 is an apocalyptic number.

21716340715 is a deficient number, since it is larger than the sum of its proper divisors (5260715765).

21716340715 is a wasteful number, since it uses less digits than its factorization.

21716340715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104702.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 21716340715 in words is "twenty-one billion, seven hundred sixteen million, three hundred forty thousand, seven hundred fifteen".