16720470 has 96 divisors (see below), whose sum is σ = 48432384. Its totient is φ = 3974400.

The previous prime is 16720441. The next prime is 16720477. The reversal of 16720470 is 7402761.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16720477) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36040 + ... + 36500.

It is an arithmetic number, because the mean of its divisors is an integer number (504504).

Almost surely, 2^16720470 is an apocalyptic number.

16720470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16720470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24216192).

16720470 is an abundant number, since it is smaller than the sum of its proper divisors (31711914).

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

16720470 is a wasteful number, since it uses less digits than its factorization.

16720470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 16720470 is about 4089.0671307769. The cubic root of 16720470 is about 255.7110488978.

The spelling of 16720470 in words is "sixteen million, seven hundred twenty thousand, four hundred seventy".