20901822 has 16 divisors (see below), whose sum is σ = 42593040. Its totient is φ = 6835712.

The previous prime is 20901821. The next prime is 20901863. The reversal of 20901822 is 22810902.

It is a junction number, because it is equal to n+sod(n) for n = 20901792 and 20901801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20901821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32547 + ... + 33182.

It is an arithmetic number, because the mean of its divisors is an integer number (2662065).

Almost surely, 2^20901822 is an apocalyptic number.

20901822 is an abundant number, since it is smaller than the sum of its proper divisors (21691218).

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

20901822 is a wasteful number, since it uses less digits than its factorization.

20901822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65787.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20901822 is about 4571.8510474424. The cubic root of 20901822 is about 275.4618003850.

The spelling of 20901822 in words is "twenty million, nine hundred one thousand, eight hundred twenty-two".