16620042 has 16 divisors (see below), whose sum is σ = 33294240. Its totient is φ = 5530992.

The previous prime is 16620017. The next prime is 16620049. The reversal of 16620042 is 24002661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (16620049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2509 + ... + 6287.

It is an arithmetic number, because the mean of its divisors is an integer number (2080890).

Almost surely, 2^16620042 is an apocalyptic number.

16620042 is an abundant number, since it is smaller than the sum of its proper divisors (16674198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16620042 is a wasteful number, since it uses less digits than its factorization.

16620042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 16620042 is about 4076.7685732698. The cubic root of 16620042 is about 255.1980621931.

The spelling of 16620042 in words is "sixteen million, six hundred twenty thousand, forty-two".