20906622 has 72 divisors (see below), whose sum is σ = 51662520. Its totient is φ = 6098400.

The previous prime is 20906581. The next prime is 20906629. The reversal of 20906622 is 22660902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20906629) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 62997 + ... + 63327.

It is an arithmetic number, because the mean of its divisors is an integer number (717535).

Almost surely, 2^20906622 is an apocalyptic number.

20906622 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 20906622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25831260).

20906622 is an abundant number, since it is smaller than the sum of its proper divisors (30755898).

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

20906622 is a wasteful number, since it uses less digits than its factorization.

20906622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20906622 is about 4572.3759687935. The cubic root of 20906622 is about 275.4828849176.

It can be divided in two parts, 20906 and 622, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 20906622 in words is "twenty million, nine hundred six thousand, six hundred twenty-two".