20775612 has 48 divisors (see below), whose sum is σ = 56956032. Its totient is φ = 5810880.

The previous prime is 20775593. The next prime is 20775613. The reversal of 20775612 is 21657702.

It is a self number, because there is not a number n which added to its sum of digits gives 20775612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4338 + ... + 7769.

It is an arithmetic number, because the mean of its divisors is an integer number (1186584).

Almost surely, 2^20775612 is an apocalyptic number.

20775612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20775612 is an abundant number, since it is smaller than the sum of its proper divisors (36180420).

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

20775612 is a wasteful number, since it uses less digits than its factorization.

20775612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12138 (or 12136 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 20775612 is about 4558.0272048332. The cubic root of 20775612 is about 274.9062468291.

The spelling of 20775612 in words is "twenty million, seven hundred seventy-five thousand, six hundred twelve".