21361027600 has 60 divisors (see below), whose sum is σ = 55985322960. Its totient is φ = 7767644800.

The previous prime is 21361027591. The next prime is 21361027601. The reversal of 21361027600 is 672016312.

It is not an unprimeable number, because it can be changed into a prime (21361027601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2422990 + ... + 2431789.

It is an arithmetic number, because the mean of its divisors is an integer number (933088716).

Almost surely, 2^21361027600 is an apocalyptic number.

21361027600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21361027600 is an abundant number, since it is smaller than the sum of its proper divisors (34624295360).

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

21361027600 is a wasteful number, since it uses less digits than its factorization.

21361027600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4854808 (or 4854797 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The spelling of 21361027600 in words is "twenty-one billion, three hundred sixty-one million, twenty-seven thousand, six hundred".