20386236 has 24 divisors (see below), whose sum is σ = 51227344. Its totient is φ = 6272640.

The previous prime is 20386229. The next prime is 20386237. The reversal of 20386236 is 63268302.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20386237) by changing a digit.

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, 65185 + ... + 65496.

Almost surely, 2^20386236 is an apocalyptic number.

20386236 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20386236 is an abundant number, since it is smaller than the sum of its proper divisors (30841108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20386236 is a wasteful number, since it uses less digits than its factorization.

20386236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130701 (or 130699 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20386236 is about 4515.1119587448. Note that the first 3 decimals coincide. The cubic root of 20386236 is about 273.1779756974.

The spelling of 20386236 in words is "twenty million, three hundred eighty-six thousand, two hundred thirty-six".