20853426 has 16 divisors (see below), whose sum is σ = 45498528. Its totient is φ = 6319200.

The previous prime is 20853419. The next prime is 20853439. The reversal of 20853426 is 62435802.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20853393 and 20853402.

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, 157915 + ... + 158046.

It is an arithmetic number, because the mean of its divisors is an integer number (2843658).

Almost surely, 2^20853426 is an apocalyptic number.

20853426 is an abundant number, since it is smaller than the sum of its proper divisors (24645102).

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

20853426 is a wasteful number, since it uses less digits than its factorization.

20853426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315977.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 20853426 is about 4566.5551567894. Note that the first 3 decimals coincide. The cubic root of 20853426 is about 275.2490350164.

The spelling of 20853426 in words is "twenty million, eight hundred fifty-three thousand, four hundred twenty-six".