21108162 has 16 divisors (see below), whose sum is σ = 42550272. Its totient is φ = 6980400.

The previous prime is 21108137. The next prime is 21108163. The reversal of 21108162 is 26180112.

It is not an unprimeable number, because it can be changed into a prime (21108163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13089 + ... + 14612.

It is an arithmetic number, because the mean of its divisors is an integer number (2659392).

Almost surely, 2^21108162 is an apocalyptic number.

21108162 is an abundant number, since it is smaller than the sum of its proper divisors (21442110).

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

21108162 is a wasteful number, since it uses less digits than its factorization.

21108162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27833.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 21108162 is about 4594.3619796442. The cubic root of 21108162 is about 276.3652746049.

Adding to 21108162 its reverse (26180112), we get a palindrome (47288274).

The spelling of 21108162 in words is "twenty-one million, one hundred eight thousand, one hundred sixty-two".