21545525005032 has 128 divisors (see below), whose sum is σ = 62282270131200. Its totient is φ = 6083776224768.

The previous prime is 21545525004979. The next prime is 21545525005177. The reversal of 21545525005032 is 23050052554512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6101668 + ... + 8962220.

It is an arithmetic number, because the mean of its divisors is an integer number (486580235400).

Almost surely, 2^{21545525005032} 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 21545525005032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31141135065600).

21545525005032 is an abundant number, since it is smaller than the sum of its proper divisors (40736745126168).

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

21545525005032 is a wasteful number, since it uses less digits than its factorization.

21545525005032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861095 (or 2861091 counting only the distinct ones).

The product of its (nonzero) digits is 300000, while the sum is 39.

Adding to 21545525005032 its reverse (23050052554512), we get a palindrome (44595577559544).

The spelling of 21545525005032 in words is "twenty-one trillion, five hundred forty-five billion, five hundred twenty-five million, five thousand, thirty-two".