16720992 has 60 divisors (see below), whose sum is σ = 49183596. Its totient is φ = 5572800.

The previous prime is 16720973. The next prime is 16720993. The reversal of 16720992 is 29902761.

16720992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16720993) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 634 + ... + 5817.

Almost surely, 2^16720992 is an apocalyptic number.

16720992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16720992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24591798).

16720992 is an abundant number, since it is smaller than the sum of its proper divisors (32462604).

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

16720992 is an equidigital number, since it uses as much as digits as its factorization.

16720992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6473 (or 6456 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 16720992 is about 4089.1309590181. The cubic root of 16720992 is about 255.7137099031.

The spelling of 16720992 in words is "sixteen million, seven hundred twenty thousand, nine hundred ninety-two".