16909540 has 24 divisors (see below), whose sum is σ = 35687232. Its totient is φ = 6730080.

The previous prime is 16909537. The next prime is 16909547. The reversal of 16909540 is 4590961.

It is a junction number, because it is equal to n+sod(n) for n = 16909496 and 16909505.

It is not an unprimeable number, because it can be changed into a prime (16909547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2217 + ... + 6223.

It is an arithmetic number, because the mean of its divisors is an integer number (1486968).

Almost surely, 2^16909540 is an apocalyptic number.

16909540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16909540 is an abundant number, since it is smaller than the sum of its proper divisors (18777692).

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

16909540 is a wasteful number, since it uses less digits than its factorization.

16909540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4227 (or 4225 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 16909540 is about 4112.1211071660. The cubic root of 16909540 is about 256.6712729444.

The spelling of 16909540 in words is "sixteen million, nine hundred nine thousand, five hundred forty".