21600027700 has 18 divisors (see below), whose sum is σ = 46872060326. Its totient is φ = 8640011040.

The previous prime is 21600027677. The next prime is 21600027707. The reversal of 21600027700 is 772000612.

It can be written as a sum of positive squares in 3 ways, for example, as 253064464 + 21346963236 = 15908^2 + 146106^2 .

It is a super-2 number, since 2×21600027700² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21600027707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108000039 + ... + 108000238.

Almost surely, 2^21600027700 is an apocalyptic number.

21600027700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21600027700 is an abundant number, since it is smaller than the sum of its proper divisors (25272032626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21600027700 is a wasteful number, since it uses less digits than its factorization.

21600027700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216000291 (or 216000284 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The spelling of 21600027700 in words is "twenty-one billion, six hundred million, twenty-seven thousand, seven hundred".