20105609344 has 32 divisors (see below), whose sum is σ = 41795634240. Its totient is φ = 9615724800.

The previous prime is 20105609327. The next prime is 20105609353. The reversal of 20105609344 is 44390650102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×20105609344² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3411732 + ... + 3417619.

It is an arithmetic number, because the mean of its divisors is an integer number (1306113570).

Almost surely, 2^20105609344 is an apocalyptic number.

It is an amenable number.

20105609344 is an abundant number, since it is smaller than the sum of its proper divisors (21690024896).

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

20105609344 is an equidigital number, since it uses as much as digits as its factorization.

20105609344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6829388 (or 6829376 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 20105609344 in words is "twenty billion, one hundred five million, six hundred nine thousand, three hundred forty-four".