21611170240460 has 24 divisors (see below), whose sum is σ = 45482764871040. Its totient is φ = 8625552407424.

The previous prime is 21611170240409. The next prime is 21611170240567. The reversal of 21611170240460 is 6404207111612.

It is a self number, because there is not a number n which added to its sum of digits gives 21611170240460.

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, 1182221180 + ... + 1182239459.

It is an arithmetic number, because the mean of its divisors is an integer number (1895115202960).

Almost surely, 2^{21611170240460} is an apocalyptic number.

21611170240460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21611170240460 is an abundant number, since it is smaller than the sum of its proper divisors (23871594630580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21611170240460 is a wasteful number, since it uses less digits than its factorization.

21611170240460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364461105 (or 2364461103 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

It can be divided in two parts, 21611 and 170240460, that added together give a palindrome (170262071).

The spelling of 21611170240460 in words is "twenty-one trillion, six hundred eleven billion, one hundred seventy million, two hundred forty thousand, four hundred sixty".