20426786 has 8 divisors (see below), whose sum is σ = 32252880. Its totient is φ = 9675828.

The previous prime is 20426773. The next prime is 20426801. The reversal of 20426786 is 68762402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268736 + ... + 268811.

It is an arithmetic number, because the mean of its divisors is an integer number (4031610).

Almost surely, 2^20426786 is an apocalyptic number.

20426786 is a deficient number, since it is larger than the sum of its proper divisors (11826094).

20426786 is a wasteful number, since it uses less digits than its factorization.

20426786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537568.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 20426786 is about 4519.6002035578. The cubic root of 20426786 is about 273.3589806722.

It can be divided in two parts, 20426 and 786, that added together give a palindrome (21212).

The spelling of 20426786 in words is "twenty million, four hundred twenty-six thousand, seven hundred eighty-six".