16690020 has 48 divisors (see below), whose sum is σ = 47826240. Its totient is φ = 4346496.

The previous prime is 16690001. The next prime is 16690031. The reversal of 16690020 is 2009661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655 + ... + 5814.

It is an arithmetic number, because the mean of its divisors is an integer number (996380).

Almost surely, 2^16690020 is an apocalyptic number.

16690020 is a gapful number since it is divisible by the number (10) 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 16690020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23913120).

16690020 is an abundant number, since it is smaller than the sum of its proper divisors (31136220).

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

16690020 is a wasteful number, since it uses less digits than its factorization.

16690020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6524 (or 6522 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 16690020 is about 4085.3420909393. The cubic root of 16690020 is about 255.5557276481. Note that the first 3 decimals are identical.

Adding to 16690020 its reverse (2009661), we get a palindrome (18699681).

The spelling of 16690020 in words is "sixteen million, six hundred ninety thousand, twenty".