21759884113 has 16 divisors (see below), whose sum is σ = 23946132672. Its totient is φ = 19771884000.

The previous prime is 21759884101. The next prime is 21759884117. The reversal of 21759884113 is 31148895712.

It is not a de Polignac number, because 21759884113 - 2²¹ = 21757786961 is a prime.

It is a super-2 number, since 2×21759884113² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21759884117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4886538 + ... + 4890988.

It is an arithmetic number, because the mean of its divisors is an integer number (1496633292).

Almost surely, 2^21759884113 is an apocalyptic number.

It is an amenable number.

21759884113 is a deficient number, since it is larger than the sum of its proper divisors (2186248559).

21759884113 is an equidigital number, since it uses as much as digits as its factorization.

21759884113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8157 (or 8135 counting only the distinct ones).

The product of its digits is 483840, while the sum is 49.

The spelling of 21759884113 in words is "twenty-one billion, seven hundred fifty-nine million, eight hundred eighty-four thousand, one hundred thirteen".