20684026 has 8 divisors (see below), whose sum is σ = 33846624. Its totient is φ = 9401820.

The previous prime is 20684021. The next prime is 20684029. The reversal of 20684026 is 62048602.

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

It is a junction number, because it is equal to n+sod(n) for n = 20683985 and 20684003.

It is not an unprimeable number, because it can be changed into a prime (20684021) 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, 470070 + ... + 470113.

It is an arithmetic number, because the mean of its divisors is an integer number (4230828).

Almost surely, 2^20684026 is an apocalyptic number.

20684026 is a deficient number, since it is larger than the sum of its proper divisors (13162598).

20684026 is a wasteful number, since it uses less digits than its factorization.

20684026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940196.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 20684026 is about 4547.9694370125. The cubic root of 20684026 is about 274.5016915345.

The spelling of 20684026 in words is "twenty million, six hundred eighty-four thousand, twenty-six".