20644162 has 16 divisors (see below), whose sum is σ = 38607552. Its totient is φ = 8043120.

The previous prime is 20644157. The next prime is 20644177. The reversal of 20644162 is 26144602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66873 + ... + 67180.

It is an arithmetic number, because the mean of its divisors is an integer number (2412972).

Almost surely, 2^20644162 is an apocalyptic number.

20644162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20644162 is a deficient number, since it is larger than the sum of its proper divisors (17963390).

20644162 is a wasteful number, since it uses less digits than its factorization.

20644162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134073.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20644162 is about 4543.5847081352. The cubic root of 20644162 is about 274.3252305159.

Adding to 20644162 its reverse (26144602), we get a palindrome (46788764).

It can be divided in two parts, 2064 and 4162, that added together give a palindrome (6226).

The spelling of 20644162 in words is "twenty million, six hundred forty-four thousand, one hundred sixty-two".