16945505 has 16 divisors (see below), whose sum is σ = 21022848. Its totient is φ = 13104000.

The previous prime is 16945501. The next prime is 16945517. The reversal of 16945505 is 50554961.

It is not a de Polignac number, because 16945505 - 2² = 16945501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16945501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26540 + ... + 27170.

It is an arithmetic number, because the mean of its divisors is an integer number (1313928).

Almost surely, 2^16945505 is an apocalyptic number.

It is an amenable number.

16945505 is a deficient number, since it is larger than the sum of its proper divisors (4077343).

16945505 is a wasteful number, since it uses less digits than its factorization.

16945505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 16945505 is about 4116.4918316450. The cubic root of 16945505 is about 256.8531159639.

The spelling of 16945505 in words is "sixteen million, nine hundred forty-five thousand, five hundred five".