20550466 has 16 divisors (see below), whose sum is σ = 31792320. Its totient is φ = 9955440.

The previous prime is 20550463. The next prime is 20550469. The reversal of 20550466 is 66405502.

It is an interprime number because it is at equal distance from previous prime (20550463) and next prime (20550469).

It is not an unprimeable number, because it can be changed into a prime (20550463) 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 7 ways as a sum of consecutive naturals, for example, 24075 + ... + 24913.

It is an arithmetic number, because the mean of its divisors is an integer number (1987020).

Almost surely, 2^20550466 is an apocalyptic number.

20550466 is a deficient number, since it is larger than the sum of its proper divisors (11241854).

20550466 is a wasteful number, since it uses less digits than its factorization.

20550466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 20550466 is about 4533.2621808142. The cubic root of 20550466 is about 273.9095817594.

Adding to 20550466 its reverse (66405502), we get a palindrome (86955968).

The spelling of 20550466 in words is "twenty million, five hundred fifty thousand, four hundred sixty-six".