21109660031762 has 16 divisors (see below), whose sum is σ = 32066340000000. Its totient is φ = 10420888645440.

The previous prime is 21109660031749. The next prime is 21109660031809. The reversal of 21109660031762 is 26713006690112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2799587 + ... + 7075097.

It is an arithmetic number, because the mean of its divisors is an integer number (2004146250000).

Almost surely, 2^{21109660031762} is an apocalyptic number.

21109660031762 is a deficient number, since it is larger than the sum of its proper divisors (10956679968238).

21109660031762 is a wasteful number, since it uses less digits than its factorization.

21109660031762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4306841.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 21109660031762 in words is "twenty-one trillion, one hundred nine billion, six hundred sixty million, thirty-one thousand, seven hundred sixty-two".