21363736800 has 1152 divisors, whose sum is σ = 92154101760. Its totient is φ = 4180377600.

The previous prime is 21363736799. The next prime is 21363736859. The reversal of 21363736800 is 863736312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 168218337 + ... + 168218463.

It is an arithmetic number, because the mean of its divisors is an integer number (79994880).

Almost surely, 2^21363736800 is an apocalyptic number.

21363736800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21363736800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46077050880).

21363736800 is an abundant number, since it is smaller than the sum of its proper divisors (70790364960).

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

21363736800 is a wasteful number, since it uses less digits than its factorization.

21363736800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 21363736800 in words is "twenty-one billion, three hundred sixty-three million, seven hundred thirty-six thousand, eight hundred".