21714337687 has 8 divisors (see below), whose sum is σ = 24817552256. Its totient is φ = 18611414712.

The previous prime is 21714337679. The next prime is 21714337691. The reversal of 21714337687 is 78673341712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21714337687 - 2³ = 21714337679 is a prime.

It is a super-2 number, since 2×21714337687² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21714337687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21714337087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121108 + ... + 241030.

It is an arithmetic number, because the mean of its divisors is an integer number (3102194032).

Almost surely, 2^21714337687 is an apocalyptic number.

21714337687 is a deficient number, since it is larger than the sum of its proper divisors (3103214569).

21714337687 is a wasteful number, since it uses less digits than its factorization.

21714337687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145797.

The product of its digits is 1185408, while the sum is 49.

The spelling of 21714337687 in words is "twenty-one billion, seven hundred fourteen million, three hundred thirty-seven thousand, six hundred eighty-seven".