16620147 has 10 divisors (see below), whose sum is σ = 24827748. Its totient is φ = 11080044.

The previous prime is 16620143. The next prime is 16620157. The reversal of 16620147 is 74102661.

It is not a de Polignac number, because 16620147 - 2² = 16620143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 16620147.

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 9 ways as a sum of consecutive naturals, for example, 102513 + ... + 102674.

Almost surely, 2^16620147 is an apocalyptic number.

16620147 is a deficient number, since it is larger than the sum of its proper divisors (8207601).

16620147 is an equidigital number, since it uses as much as digits as its factorization.

16620147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205199 (or 205190 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 16620147 is about 4076.7814510960. The cubic root of 16620147 is about 255.1985996114.

The spelling of 16620147 in words is "sixteen million, six hundred twenty thousand, one hundred forty-seven".