21525300054 has 48 divisors (see below), whose sum is σ = 48553848720. Its totient is φ = 6883531200.

The previous prime is 21525299981. The next prime is 21525300059. The reversal of 21525300054 is 45000352512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21525300059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49372 + ... + 213279.

It is an arithmetic number, because the mean of its divisors is an integer number (1011538515).

Almost surely, 2^21525300054 is an apocalyptic number.

21525300054 is an abundant number, since it is smaller than the sum of its proper divisors (27028548666).

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

21525300054 is a wasteful number, since it uses less digits than its factorization.

21525300054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262845 (or 262842 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

Adding to 21525300054 its reverse (45000352512), we get a palindrome (66525652566).

The spelling of 21525300054 in words is "twenty-one billion, five hundred twenty-five million, three hundred thousand, fifty-four".