21716655245 has 8 divisors (see below), whose sum is σ = 27431564640. Its totient is φ = 16458938640.

The previous prime is 21716655229. The next prime is 21716655263. The reversal of 21716655245 is 54255661712.

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

It is not a de Polignac number, because 21716655245 - 2⁴ = 21716655229 is a prime.

It is a super-2 number, since 2×21716655245² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21716655196 and 21716655205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114298091 + ... + 114298280.

It is an arithmetic number, because the mean of its divisors is an integer number (3428945580).

Almost surely, 2^21716655245 is an apocalyptic number.

It is an amenable number.

21716655245 is a deficient number, since it is larger than the sum of its proper divisors (5714909395).

21716655245 is a wasteful number, since it uses less digits than its factorization.

21716655245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228596395.

The product of its digits is 504000, while the sum is 44.

The spelling of 21716655245 in words is "twenty-one billion, seven hundred sixteen million, six hundred fifty-five thousand, two hundred forty-five".