21232995888 has 160 divisors (see below), whose sum is σ = 61596057600. Its totient is φ = 6257599488.

The previous prime is 21232995887. The next prime is 21232995899. The reversal of 21232995888 is 88859923212.

It is a super-2 number, since 2×21232995888² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21232995887) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2293573 + ... + 2302811.

It is an arithmetic number, because the mean of its divisors is an integer number (384975360).

Almost surely, 2^21232995888 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 21232995888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30798028800).

21232995888 is an abundant number, since it is smaller than the sum of its proper divisors (40363061712).

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

21232995888 is a wasteful number, since it uses less digits than its factorization.

21232995888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9419 (or 9413 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 57.

The spelling of 21232995888 in words is "twenty-one billion, two hundred thirty-two million, nine hundred ninety-five thousand, eight hundred eighty-eight".