21752349576 has 96 divisors (see below), whose sum is σ = 59245804800. Its totient is φ = 6647495040.

The previous prime is 21752349571. The next prime is 21752349581. The reversal of 21752349576 is 67594325712.

It is an interprime number because it is at equal distance from previous prime (21752349571) and next prime (21752349581).

It is not an unprimeable number, because it can be changed into a prime (21752349571) 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, 228090 + ... + 309078.

It is an arithmetic number, because the mean of its divisors is an integer number (617143800).

Almost surely, 2^21752349576 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 21752349576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29622902400).

21752349576 is an abundant number, since it is smaller than the sum of its proper divisors (37493455224).

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

21752349576 is a wasteful number, since it uses less digits than its factorization.

21752349576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81067 (or 81044 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 51.

The spelling of 21752349576 in words is "twenty-one billion, seven hundred fifty-two million, three hundred forty-nine thousand, five hundred seventy-six".