20422131 has 24 divisors (see below), whose sum is σ = 29169360. Its totient is φ = 12705984.

The previous prime is 20422121. The next prime is 20422133. The reversal of 20422131 is 13122402.

It is not a de Polignac number, because 20422131 - 2¹¹ = 20420083 is a prime.

It is a super-2 number, since 2×20422131² = 834126869162322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20422131.

It is not an unprimeable number, because it can be changed into a prime (20422133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117961 + ... + 118133.

It is an arithmetic number, because the mean of its divisors is an integer number (1215390).

Almost surely, 2^20422131 is an apocalyptic number.

20422131 is a deficient number, since it is larger than the sum of its proper divisors (8747229).

20422131 is a wasteful number, since it uses less digits than its factorization.

20422131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 20422131 is about 4519.0851950367. The cubic root of 20422131 is about 273.3382141041.

Adding to 20422131 its reverse (13122402), we get a palindrome (33544533).

The spelling of 20422131 in words is "twenty million, four hundred twenty-two thousand, one hundred thirty-one".