21072500488 has 48 divisors (see below), whose sum is σ = 42947435520. Its totient is φ = 9688625856.

The previous prime is 21072500483. The next prime is 21072500489. The reversal of 21072500488 is 88400527012.

It is not an unprimeable number, because it can be changed into a prime (21072500483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325945 + ... + 385207.

It is an arithmetic number, because the mean of its divisors is an integer number (894738240).

Almost surely, 2^21072500488 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 21072500488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21473717760).

21072500488 is an abundant number, since it is smaller than the sum of its proper divisors (21874935032).

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

21072500488 is a wasteful number, since it uses less digits than its factorization.

21072500488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59558 (or 59541 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 21072500488 in words is "twenty-one billion, seventy-two million, five hundred thousand, four hundred eighty-eight".