20853460 has 24 divisors (see below), whose sum is σ = 44512776. Its totient is φ = 8204160.

The previous prime is 20853439. The next prime is 20853473. The reversal of 20853460 is 6435802.

It can be written as a sum of positive squares in 4 ways, for example, as 41616 + 20811844 = 204^2 + 4562^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7327 + ... + 9766.

It is an arithmetic number, because the mean of its divisors is an integer number (1854699).

Almost surely, 2^20853460 is an apocalyptic number.

20853460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20853460 is an abundant number, since it is smaller than the sum of its proper divisors (23659316).

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

20853460 is a wasteful number, since it uses less digits than its factorization.

20853460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17163 (or 17161 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20853460 is about 4566.5588795065. The cubic root of 20853460 is about 275.2491846075.

The spelling of 20853460 in words is "twenty million, eight hundred fifty-three thousand, four hundred sixty".