20522131 has 6 divisors (see below), whose sum is σ = 23872740. Its totient is φ = 17590356.

The previous prime is 20522119. The next prime is 20522143. The reversal of 20522131 is 13122502.

It is an interprime number because it is at equal distance from previous prime (20522119) and next prime (20522143).

It is not a de Polignac number, because 20522131 - 2¹⁵ = 20489363 is a prime.

It is a super-2 number, since 2×20522131² = 842315721562322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20522731) 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 5 ways as a sum of consecutive naturals, for example, 209361 + ... + 209458.

It is an arithmetic number, because the mean of its divisors is an integer number (3978790).

Almost surely, 2^20522131 is an apocalyptic number.

20522131 is a deficient number, since it is larger than the sum of its proper divisors (3350609).

20522131 is an equidigital number, since it uses as much as digits as its factorization.

20522131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418833 (or 418826 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20522131 is about 4530.1358699271. The cubic root of 20522131 is about 273.7836349350.

Adding to 20522131 its reverse (13122502), we get a palindrome (33644633).

The spelling of 20522131 in words is "twenty million, five hundred twenty-two thousand, one hundred thirty-one".