20540826 has 24 divisors (see below), whose sum is σ = 44684640. Its totient is φ = 6819336.

The previous prime is 20540789. The next prime is 20540827. The reversal of 20540826 is 62804502.

It is a self number, because there is not a number n which added to its sum of digits gives 20540826.

It is not an unprimeable number, because it can be changed into a prime (20540827) 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, 2565 + ... + 6903.

It is an arithmetic number, because the mean of its divisors is an integer number (1861860).

Almost surely, 2^20540826 is an apocalyptic number.

20540826 is an abundant number, since it is smaller than the sum of its proper divisors (24143814).

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

20540826 is a wasteful number, since it uses less digits than its factorization.

20540826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4610 (or 4607 counting only the distinct ones).

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

The square root of 20540826 is about 4532.1988041126. The cubic root of 20540826 is about 273.8667457259.

The spelling of 20540826 in words is "twenty million, five hundred forty thousand, eight hundred twenty-six".