20122536 has 96 divisors (see below), whose sum is σ = 59590080. Its totient is φ = 5644800.

The previous prime is 20122519. The next prime is 20122541. The reversal of 20122536 is 63522102.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 83376 + ... + 83616.

It is an arithmetic number, because the mean of its divisors is an integer number (620730).

Almost surely, 2^20122536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20122536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29795040).

20122536 is an abundant number, since it is smaller than the sum of its proper divisors (39467544).

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

20122536 is a wasteful number, since it uses less digits than its factorization.

20122536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 324 counting only the distinct ones).

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

The square root of 20122536 is about 4485.8149761220. The cubic root of 20122536 is about 271.9949898154.

Adding to 20122536 its reverse (63522102), we get a palindrome (83644638).

The spelling of 20122536 in words is "twenty million, one hundred twenty-two thousand, five hundred thirty-six".