16019945 has 8 divisors (see below), whose sum is σ = 20235840. Its totient is φ = 12141360.

The previous prime is 16019929. The next prime is 16019947. The reversal of 16019945 is 54991061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16019945 - 2⁴ = 16019929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16019947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84221 + ... + 84410.

It is an arithmetic number, because the mean of its divisors is an integer number (2529480).

Almost surely, 2^16019945 is an apocalyptic number.

It is an amenable number.

16019945 is a deficient number, since it is larger than the sum of its proper divisors (4215895).

16019945 is a wasteful number, since it uses less digits than its factorization.

16019945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168655.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 16019945 is about 4002.4923485249. The cubic root of 16019945 is about 252.0888711910.

The spelling of 16019945 in words is "sixteen million, nineteen thousand, nine hundred forty-five".