20465105445660 has 48 divisors (see below), whose sum is σ = 57302500298400. Its totient is φ = 5457341923584.

The previous prime is 20465105445611. The next prime is 20465105445713. The reversal of 20465105445660 is 6654450156402.

It is a happy number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 25600086 + ... + 26387394.

It is an arithmetic number, because the mean of its divisors is an integer number (1193802089550).

Almost surely, 2^{20465105445660} is an apocalyptic number.

20465105445660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20465105445660 is an abundant number, since it is smaller than the sum of its proper divisors (36837394852740).

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

20465105445660 is a wasteful number, since it uses less digits than its factorization.

20465105445660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220550 (or 1220548 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 20465105445660 in words is "twenty trillion, four hundred sixty-five billion, one hundred five million, four hundred forty-five thousand, six hundred sixty".