20686226 has 16 divisors (see below), whose sum is σ = 34426080. Its totient is φ = 9242880.

The previous prime is 20686201. The next prime is 20686241. The reversal of 20686226 is 62268602.

It is a super-2 number, since 2×20686226² = 855839892246152, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20686192 and 20686201.

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, 6671 + ... + 9266.

It is an arithmetic number, because the mean of its divisors is an integer number (2151630).

Almost surely, 2^20686226 is an apocalyptic number.

20686226 is a deficient number, since it is larger than the sum of its proper divisors (13739854).

20686226 is a wasteful number, since it uses less digits than its factorization.

20686226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16009.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20686226 is about 4548.2112967627. The cubic root of 20686226 is about 274.5114233973.

The spelling of 20686226 in words is "twenty million, six hundred eighty-six thousand, two hundred twenty-six".