20853822 has 16 divisors (see below), whose sum is σ = 45499392. Its totient is φ = 6319320.

The previous prime is 20853821. The next prime is 20853823. The reversal of 20853822 is 22835802.

It is an interprime number because it is at equal distance from previous prime (20853821) and next prime (20853823).

It is a self number, because there is not a number n which added to its sum of digits gives 20853822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853821) 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, 157918 + ... + 158049.

It is an arithmetic number, because the mean of its divisors is an integer number (2843712).

Almost surely, 2^20853822 is an apocalyptic number.

20853822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20853822 is an abundant number, since it is smaller than the sum of its proper divisors (24645570).

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

20853822 is a wasteful number, since it uses less digits than its factorization.

20853822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315983.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20853822 is about 4566.5985153066. The cubic root of 20853822 is about 275.2507773029.

The spelling of 20853822 in words is "twenty million, eight hundred fifty-three thousand, eight hundred twenty-two".