21740573232 has 240 divisors, whose sum is σ = 73172459520. Its totient is φ = 6161920128.

The previous prime is 21740573221. The next prime is 21740573263. The reversal of 21740573232 is 23237504712.

21740573232 is a `hidden beast` number, since 2 + 17 + 40 + 573 + 2 + 32 = 666.

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

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2684293 + ... + 2692379.

It is an arithmetic number, because the mean of its divisors is an integer number (304885248).

Almost surely, 2^21740573232 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 21740573232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36586229760).

21740573232 is an abundant number, since it is smaller than the sum of its proper divisors (51431886288).

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

21740573232 is a wasteful number, since it uses less digits than its factorization.

21740573232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8245 (or 8226 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The spelling of 21740573232 in words is "twenty-one billion, seven hundred forty million, five hundred seventy-three thousand, two hundred thirty-two".