20522775 has 96 divisors (see below), whose sum is σ = 43552768. Its totient is φ = 8294400.

The previous prime is 20522773. The next prime is 20522783. The reversal of 20522775 is 57722502.

It is not a de Polignac number, because 20522775 - 2¹ = 20522773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 211527 + ... + 211623.

Almost surely, 2^20522775 is an apocalyptic number.

20522775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20522775 is an abundant number, since it is smaller than the sum of its proper divisors (23029993).

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

20522775 is a wasteful number, since it uses less digits than its factorization.

20522775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 20522775 is about 4530.2069489152. The cubic root of 20522775 is about 273.7864987510.

The spelling of 20522775 in words is "twenty million, five hundred twenty-two thousand, seven hundred seventy-five".