20426836 has 12 divisors (see below), whose sum is σ = 36421812. Its totient is φ = 10020608.

The previous prime is 20426831. The next prime is 20426839. The reversal of 20426836 is 63862402.

It can be written as a sum of positive squares in 2 ways, for example, as 7322436 + 13104400 = 2706^2 + 3620^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20426798 and 20426807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20426831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47965 + ... + 48388.

It is an arithmetic number, because the mean of its divisors is an integer number (3035151).

Almost surely, 2^20426836 is an apocalyptic number.

It is an amenable number.

20426836 is a deficient number, since it is larger than the sum of its proper divisors (15994976).

20426836 is a wasteful number, since it uses less digits than its factorization.

20426836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96410 (or 96408 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 20426836 is about 4519.6057350172. The cubic root of 20426836 is about 273.3592037117.

It can be divided in two parts, 204268 and 36, that added together give a square (204304 = 452²).

The spelling of 20426836 in words is "twenty million, four hundred twenty-six thousand, eight hundred thirty-six".