20522136 has 16 divisors (see below), whose sum is σ = 51305400. Its totient is φ = 6840704.

The previous prime is 20522119. The next prime is 20522143. The reversal of 20522136 is 63122502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427521 + ... + 427568.

Almost surely, 2^20522136 is an apocalyptic number.

It is an amenable number.

20522136 is an abundant number, since it is smaller than the sum of its proper divisors (30783264).

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

20522136 is a wasteful number, since it uses less digits than its factorization.

20522136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855098 (or 855094 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20522136 is about 4530.1364217869. The cubic root of 20522136 is about 273.7836571699.

Adding to 20522136 its reverse (63122502), we get a palindrome (83644638).

The spelling of 20522136 in words is "twenty million, five hundred twenty-two thousand, one hundred thirty-six".