21324548700 has 576 divisors, whose sum is σ = 84966784000. Its totient is φ = 4467778560.

The previous prime is 21324548669. The next prime is 21324548753. The reversal of 21324548700 is 784542312.

It is a happy number.

21324548700 is a `hidden beast` number, since 2 + 132 + 45 + 487 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 56265111 + ... + 56265489.

Almost surely, 2^21324548700 is an apocalyptic number.

21324548700 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 21324548700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42483392000).

21324548700 is an abundant number, since it is smaller than the sum of its proper divisors (63642235300).

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

21324548700 is a wasteful number, since it uses less digits than its factorization.

21324548700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 21324548700 in words is "twenty-one billion, three hundred twenty-four million, five hundred forty-eight thousand, seven hundred".