21600000005 has 32 divisors (see below), whose sum is σ = 27553720320. Its totient is φ = 16220001600.

The previous prime is 21599999969. The next prime is 21600000017. The reversal of 21600000005 is 50000000612.

It is a de Polignac number, because none of the positive numbers 2^k-21600000005 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4360280 + ... + 4365230.

It is an arithmetic number, because the mean of its divisors is an integer number (861053760).

Almost surely, 2^21600000005 is an apocalyptic number.

It is an amenable number.

21600000005 is a deficient number, since it is larger than the sum of its proper divisors (5953720315).

21600000005 is a wasteful number, since it uses less digits than its factorization.

21600000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681.

The product of its (nonzero) digits is 60, while the sum is 14.

Adding to 21600000005 its reverse (50000000612), we get a palindrome (71600000617).

The spelling of 21600000005 in words is "twenty-one billion, six hundred million, five", and thus it is an aban number.