21716481699 has 96 divisors (see below), whose sum is σ = 37680595200. Its totient is φ = 12253887360.

The previous prime is 21716481697. The next prime is 21716481707. The reversal of 21716481699 is 99618461712.

21716481699 is a `hidden beast` number, since 2 + 1 + 71 + 6 + 481 + 6 + 99 = 666.

It is not a de Polignac number, because 21716481699 - 2¹ = 21716481697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21716481697) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6324087 + ... + 6327519.

It is an arithmetic number, because the mean of its divisors is an integer number (392506200).

Almost surely, 2^21716481699 is an apocalyptic number.

21716481699 is a deficient number, since it is larger than the sum of its proper divisors (15964113501).

21716481699 is a wasteful number, since it uses less digits than its factorization.

21716481699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550 (or 3525 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The spelling of 21716481699 in words is "twenty-one billion, seven hundred sixteen million, four hundred eighty-one thousand, six hundred ninety-nine".