16550418 has 32 divisors (see below), whose sum is σ = 35259840. Its totient is φ = 5160960.

The previous prime is 16550411. The next prime is 16550419. The reversal of 16550418 is 81405561.

It is not an unprimeable number, because it can be changed into a prime (16550411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21138 + ... + 21906.

It is an arithmetic number, because the mean of its divisors is an integer number (1101870).

Almost surely, 2^16550418 is an apocalyptic number.

16550418 is an abundant number, since it is smaller than the sum of its proper divisors (18709422).

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

16550418 is a wasteful number, since it uses less digits than its factorization.

16550418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 16550418 is about 4068.2204954992. The cubic root of 16550418 is about 254.8412083285.

Adding to 16550418 its reverse (81405561), we get a palindrome (97955979).

The spelling of 16550418 in words is "sixteen million, five hundred fifty thousand, four hundred eighteen".