20238686 has 32 divisors (see below), whose sum is σ = 35108640. Its totient is φ = 8671104.

The previous prime is 20238677. The next prime is 20238703. The reversal of 20238686 is 68683202.

It is a super-2 number, since 2×20238686² = 819208822013192, which contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 25796 + ... + 26568.

It is an arithmetic number, because the mean of its divisors is an integer number (1097145).

Almost surely, 2^20238686 is an apocalyptic number.

20238686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20238686 is a deficient number, since it is larger than the sum of its proper divisors (14869954).

20238686 is a wasteful number, since it uses less digits than its factorization.

20238686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 20238686 is about 4498.7427132478. The cubic root of 20238686 is about 272.5173167460.

The spelling of 20238686 in words is "twenty million, two hundred thirty-eight thousand, six hundred eighty-six".