20164650 has 96 divisors (see below), whose sum is σ = 55550016. Its totient is φ = 4840000.

The previous prime is 20164649. The next prime is 20164733. The reversal of 20164650 is 5646102.

It is a super-2 number, since 2×20164650² = 813226219245000, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20164650.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 199600 + ... + 199700.

It is an arithmetic number, because the mean of its divisors is an integer number (578646).

Almost surely, 2^20164650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20164650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27775008).

20164650 is an abundant number, since it is smaller than the sum of its proper divisors (35385366).

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

20164650 is a wasteful number, since it uses less digits than its factorization.

20164650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20164650 is about 4490.5066529290. The cubic root of 20164650 is about 272.1846083128.

It can be divided in two parts, 2016 and 4650, that added together give a palindrome (6666).

The spelling of 20164650 in words is "twenty million, one hundred sixty-four thousand, six hundred fifty".