20635626 has 32 divisors (see below), whose sum is σ = 45577728. Its totient is φ = 6176240.

The previous prime is 20635597. The next prime is 20635627. The reversal of 20635626 is 62653602.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20635593 and 20635602.

It is not an unprimeable number, because it can be changed into a prime (20635627) 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 15 ways as a sum of consecutive naturals, for example, 3595 + ... + 7361.

It is an arithmetic number, because the mean of its divisors is an integer number (1424304).

Almost surely, 2^20635626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20635626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22788864).

20635626 is an abundant number, since it is smaller than the sum of its proper divisors (24942102).

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

20635626 is a wasteful number, since it uses less digits than its factorization.

20635626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3866.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20635626 is about 4542.6452646008. The cubic root of 20635626 is about 274.2874157416.

The spelling of 20635626 in words is "twenty million, six hundred thirty-five thousand, six hundred twenty-six".