20440204416 has 64 divisors (see below), whose sum is σ = 60327002400. Its totient is φ = 6813400320.

The previous prime is 20440204391. The next prime is 20440204441. The reversal of 20440204416 is 61440204402.

It is a happy number.

20440204416 is a `hidden beast` number, since 2 + 0 + 4 + 40 + 204 + 416 = 666.

It is an interprime number because it is at equal distance from previous prime (20440204391) and next prime (20440204441).

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20440204416.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2953750 + ... + 2960661.

Almost surely, 2^20440204416 is an apocalyptic number.

It is an amenable number.

20440204416 is an abundant number, since it is smaller than the sum of its proper divisors (39886797984).

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

20440204416 is an equidigital number, since it uses as much as digits as its factorization.

20440204416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5914434 (or 5914416 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 20440204416 its reverse (61440204402), we get a palindrome (81880408818).

The spelling of 20440204416 in words is "twenty billion, four hundred forty million, two hundred four thousand, four hundred sixteen".