20775608 has 24 divisors (see below), whose sum is σ = 45315000. Its totient is φ = 8903664.

The previous prime is 20775593. The next prime is 20775613. The reversal of 20775608 is 80657702.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 26108 + ... + 26891.

It is an arithmetic number, because the mean of its divisors is an integer number (1888125).

Almost surely, 2^20775608 is an apocalyptic number.

20775608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20775608 is an abundant number, since it is smaller than the sum of its proper divisors (24539392).

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

20775608 is a wasteful number, since it uses less digits than its factorization.

20775608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53019 (or 53008 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 20775608 is about 4558.0267660469. The cubic root of 20775608 is about 274.9062291862.

The spelling of 20775608 in words is "twenty million, seven hundred seventy-five thousand, six hundred eight".