20306622 has 16 divisors (see below), whose sum is σ = 46415232. Its totient is φ = 5801880.

The previous prime is 20306617. The next prime is 20306623. The reversal of 20306622 is 22660302.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20306623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241704 + ... + 241787.

It is an arithmetic number, because the mean of its divisors is an integer number (2900952).

Almost surely, 2^20306622 is an apocalyptic number.

20306622 is an abundant number, since it is smaller than the sum of its proper divisors (26108610).

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

20306622 is a wasteful number, since it uses less digits than its factorization.

20306622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483503.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20306622 is about 4506.2869415962. The cubic root of 20306622 is about 272.8218994267.

Adding to 20306622 its reverse (22660302), we get a palindrome (42966924).

The spelling of 20306622 in words is "twenty million, three hundred six thousand, six hundred twenty-two".