16620145 has 16 divisors (see below), whose sum is σ = 21301632. Its totient is φ = 12418560.

The previous prime is 16620143. The next prime is 16620157. The reversal of 16620145 is 54102661.

It is not a de Polignac number, because 16620145 - 2¹ = 16620143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16620143) 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, 3265 + ... + 6625.

It is an arithmetic number, because the mean of its divisors is an integer number (1331352).

Almost surely, 2^16620145 is an apocalyptic number.

It is an amenable number.

16620145 is a deficient number, since it is larger than the sum of its proper divisors (4681487).

16620145 is a wasteful number, since it uses less digits than its factorization.

16620145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 16620145 is about 4076.7812058044. The cubic root of 16620145 is about 255.1985893748.

The spelling of 16620145 in words is "sixteen million, six hundred twenty thousand, one hundred forty-five".