21359244874 has 16 divisors (see below), whose sum is σ = 34963418016. Its totient is φ = 9705434800.

The previous prime is 21359244871. The next prime is 21359245001. The reversal of 21359244874 is 47844295312.

It is a super-3 number, since 3×21359244874³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21359244871) 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, 99112 + ... + 229219.

It is an arithmetic number, because the mean of its divisors is an integer number (2185213626).

Almost surely, 2^21359244874 is an apocalyptic number.

21359244874 is a deficient number, since it is larger than the sum of its proper divisors (13604173142).

21359244874 is a wasteful number, since it uses less digits than its factorization.

21359244874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331301.

The product of its digits is 1935360, while the sum is 49.

The spelling of 21359244874 in words is "twenty-one billion, three hundred fifty-nine million, two hundred forty-four thousand, eight hundred seventy-four".