21600049005 has 16 divisors (see below), whose sum is σ = 38400087360. Its totient is φ = 11520026064.

The previous prime is 21600049001. The next prime is 21600049039. The reversal of 21600049005 is 50094000612.

It is not a de Polignac number, because 21600049005 - 2² = 21600049001 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 21600049005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21600049001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80000047 + ... + 80000316.

It is an arithmetic number, because the mean of its divisors is an integer number (2400005460).

Almost surely, 2^21600049005 is an apocalyptic number.

It is an amenable number.

21600049005 is a deficient number, since it is larger than the sum of its proper divisors (16800038355).

21600049005 is a wasteful number, since it uses less digits than its factorization.

21600049005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160000377 (or 160000371 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 21600049005 its reverse (50094000612), we get a palindrome (71694049617).

The spelling of 21600049005 in words is "twenty-one billion, six hundred million, forty-nine thousand, five".