16720204440 has 64 divisors (see below), whose sum is σ = 52800652800. Its totient is φ = 4224051072.

The previous prime is 16720204411. The next prime is 16720204447. The reversal of 16720204440 is 4440202761.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 16720204398 and 16720204407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16720204447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3664432 + ... + 3668991.

It is an arithmetic number, because the mean of its divisors is an integer number (825010200).

Almost surely, 2^16720204440 is an apocalyptic number.

16720204440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16720204440 is an abundant number, since it is smaller than the sum of its proper divisors (36080448360).

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

16720204440 is a wasteful number, since it uses less digits than its factorization.

16720204440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7333456 (or 7333452 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The spelling of 16720204440 in words is "sixteen billion, seven hundred twenty million, two hundred four thousand, four hundred forty".