16645047 has 16 divisors (see below), whose sum is σ = 23178240. Its totient is φ = 10612800.

The previous prime is 16645039. The next prime is 16645049. The reversal of 16645047 is 74054661.

It is not a de Polignac number, because 16645047 - 2³ = 16645039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16644999 and 16645017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645049) 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, 7272 + ... + 9282.

It is an arithmetic number, because the mean of its divisors is an integer number (1448640).

Almost surely, 2^16645047 is an apocalyptic number.

16645047 is a deficient number, since it is larger than the sum of its proper divisors (6533193).

16645047 is a wasteful number, since it uses less digits than its factorization.

16645047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 16645047 is about 4079.8341878071. The cubic root of 16645047 is about 255.3259806427.

The spelling of 16645047 in words is "sixteen million, six hundred forty-five thousand, forty-seven".