21483645723072 has 784 divisors, whose sum is σ = 69531185031840. Its totient is φ = 6543891431424.

The previous prime is 21483645723017. The next prime is 21483645723079. The reversal of 21483645723072 is 27032754638412.

21483645723072 is a `hidden beast` number, since 2 + 1 + 4 + 8 + 3 + 64 + 572 + 3 + 0 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21483645723079) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 47010165468 + ... + 47010165924.

It is an arithmetic number, because the mean of its divisors is an integer number (88687736010).

Almost surely, 2^{21483645723072} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21483645723072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34765592515920).

21483645723072 is an abundant number, since it is smaller than the sum of its proper divisors (48047539308768).

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

21483645723072 is a wasteful number, since it uses less digits than its factorization.

21483645723072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112 (or 1087 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 54.

The spelling of 21483645723072 in words is "twenty-one trillion, four hundred eighty-three billion, six hundred forty-five million, seven hundred twenty-three thousand, seventy-two".