21109272674 has 48 divisors (see below), whose sum is σ = 39335512128. Its totient is φ = 8316580608.

The previous prime is 21109272647. The next prime is 21109272683. The reversal of 21109272674 is 47627290112.

It is a super-2 number, since 2×21109272674² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 113312 + ... + 234644.

It is an arithmetic number, because the mean of its divisors is an integer number (819489836).

Almost surely, 2^21109272674 is an apocalyptic number.

21109272674 is a deficient number, since it is larger than the sum of its proper divisors (18226239454).

21109272674 is a wasteful number, since it uses less digits than its factorization.

21109272674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121419 (or 121402 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 21109272674 in words is "twenty-one billion, one hundred nine million, two hundred seventy-two thousand, six hundred seventy-four".