20345622 has 64 divisors (see below), whose sum is σ = 46531584. Its totient is φ = 5876640.

The previous prime is 20345621. The next prime is 20345629. The reversal of 20345622 is 22654302.

It is a junction number, because it is equal to n+sod(n) for n = 20345592 and 20345601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190093 + ... + 190199.

It is an arithmetic number, because the mean of its divisors is an integer number (727056).

Almost surely, 2^20345622 is an apocalyptic number.

20345622 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20345622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23265792).

20345622 is an abundant number, since it is smaller than the sum of its proper divisors (26185962).

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

20345622 is a wasteful number, since it uses less digits than its factorization.

20345622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20345622 is about 4510.6121535774. The cubic root of 20345622 is about 272.9964442908.

Adding to 20345622 its reverse (22654302), we get a palindrome (42999924).

The spelling of 20345622 in words is "twenty million, three hundred forty-five thousand, six hundred twenty-two".