21109770584 has 32 divisors (see below), whose sum is σ = 45248366880. Its totient is φ = 9044415744.

The previous prime is 21109770559. The next prime is 21109770589. The reversal of 21109770584 is 48507790112.

It is a super-2 number, since 2×21109770584² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21109770589) 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 7 ways as a sum of consecutive naturals, for example, 146204 + ... + 252180.

It is an arithmetic number, because the mean of its divisors is an integer number (1414011465).

Almost surely, 2^21109770584 is an apocalyptic number.

It is an amenable number.

21109770584 is an abundant number, since it is smaller than the sum of its proper divisors (24138596296).

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

21109770584 is a wasteful number, since it uses less digits than its factorization.

21109770584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109547 (or 109543 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 21109770584 in words is "twenty-one billion, one hundred nine million, seven hundred seventy thousand, five hundred eighty-four".