16653980 has 48 divisors (see below), whose sum is σ = 40836096. Its totient is φ = 5586240.

The previous prime is 16653979. The next prime is 16654003. The reversal of 16653980 is 8935661.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 5315 + ... + 7845.

It is an arithmetic number, because the mean of its divisors is an integer number (850752).

Almost surely, 2^16653980 is an apocalyptic number.

16653980 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 16653980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20418048).

16653980 is an abundant number, since it is smaller than the sum of its proper divisors (24182116).

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

16653980 is a wasteful number, since it uses less digits than its factorization.

16653980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 2592 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 16653980 is about 4080.9288158457. The cubic root of 16653980 is about 255.3716482635.

The spelling of 16653980 in words is "sixteen million, six hundred fifty-three thousand, nine hundred eighty".