16720512 has 32 divisors (see below), whose sum is σ = 44414880. Its totient is φ = 5573376.

The previous prime is 16720511. The next prime is 16720547. The reversal of 16720512 is 21502761.

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

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (16720511) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 21388 + ... + 22155.

It is an arithmetic number, because the mean of its divisors is an integer number (1387965).

Almost surely, 2^16720512 is an apocalyptic number.

16720512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16720512 is an abundant number, since it is smaller than the sum of its proper divisors (27694368).

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

16720512 is an equidigital number, since it uses as much as digits as its factorization.

16720512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43560 (or 43548 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 16720512 is about 4089.0722664194. The cubic root of 16720512 is about 255.7112630037.

The spelling of 16720512 in words is "sixteen million, seven hundred twenty thousand, five hundred twelve".