20775888 has 60 divisors (see below), whose sum is σ = 66453088. Its totient is φ = 5935680.

The previous prime is 20775883. The next prime is 20775899. The reversal of 20775888 is 88857702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775883) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9298 + ... + 11313.

Almost surely, 2^20775888 is an apocalyptic number.

20775888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20775888 is an abundant number, since it is smaller than the sum of its proper divisors (45677200).

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

20775888 is a wasteful number, since it uses less digits than its factorization.

20775888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20632 (or 20623 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 20775888 is about 4558.0574809890. The cubic root of 20775888 is about 274.9074641826.

The spelling of 20775888 in words is "twenty million, seven hundred seventy-five thousand, eight hundred eighty-eight".