21892579488 has 144 divisors (see below), whose sum is σ = 67206537216. Its totient is φ = 6720053760.

The previous prime is 21892579487. The next prime is 21892579517. The reversal of 21892579488 is 88497529812.

21892579488 is a `hidden beast` number, since 2 + 1 + 89 + 2 + 5 + 79 + 488 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is not an unprimeable number, because it can be changed into a prime (21892579487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1606881 + ... + 1620447.

It is an arithmetic number, because the mean of its divisors is an integer number (466712064).

Almost surely, 2^21892579488 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 21892579488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33603268608).

21892579488 is an abundant number, since it is smaller than the sum of its proper divisors (45313957728).

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

21892579488 is a wasteful number, since it uses less digits than its factorization.

21892579488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14027 (or 14016 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 63.

The spelling of 21892579488 in words is "twenty-one billion, eight hundred ninety-two million, five hundred seventy-nine thousand, four hundred eighty-eight".