20853144 has 48 divisors (see below), whose sum is σ = 60824400. Its totient is φ = 6416064.

The previous prime is 20853143. The next prime is 20853187. The reversal of 20853144 is 44135802.

It is a super-2 number, since 2×20853144² = 869707229369472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20853143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10204 + ... + 12075.

It is an arithmetic number, because the mean of its divisors is an integer number (1267175).

Almost surely, 2^20853144 is an apocalyptic number.

20853144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20853144 is an abundant number, since it is smaller than the sum of its proper divisors (39971256).

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

20853144 is a wasteful number, since it uses less digits than its factorization.

20853144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22304 (or 22297 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20853144 is about 4566.5242800187. The cubic root of 20853144 is about 275.2477942838.

Adding to 20853144 its reverse (44135802), we get a palindrome (64988946).

The spelling of 20853144 in words is "twenty million, eight hundred fifty-three thousand, one hundred forty-four".