21116544374 has 16 divisors (see below), whose sum is σ = 32073087888. Its totient is φ = 10426146432.

The previous prime is 21116544331. The next prime is 21116544377. The reversal of 21116544374 is 47344561112.

It is a super-2 number, since 2×21116544374² (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 (21116544377) 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 7 ways as a sum of consecutive naturals, for example, 90647 + ... + 224610.

It is an arithmetic number, because the mean of its divisors is an integer number (2004567993).

Almost surely, 2^21116544374 is an apocalyptic number.

21116544374 is a deficient number, since it is larger than the sum of its proper divisors (10956543514).

21116544374 is a wasteful number, since it uses less digits than its factorization.

21116544374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315679.

The product of its digits is 80640, while the sum is 38.

The spelling of 21116544374 in words is "twenty-one billion, one hundred sixteen million, five hundred forty-four thousand, three hundred seventy-four".