20500386 has 8 divisors (see below), whose sum is σ = 41000784. Its totient is φ = 6833460.

The previous prime is 20500367. The next prime is 20500387. The reversal of 20500386 is 68300502.

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

20500386 is an admirable number.

It is a super-2 number, since 2×20500386² = 840531652297992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20500387) 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 3 ways as a sum of consecutive naturals, for example, 1708360 + ... + 1708371.

It is an arithmetic number, because the mean of its divisors is an integer number (5125098).

Almost surely, 2^20500386 is an apocalyptic number.

20500386 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20500386 is a wasteful number, since it uses less digits than its factorization.

20500386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3416736.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20500386 is about 4527.7351954371. The cubic root of 20500386 is about 273.6869014931.

Adding to 20500386 its reverse (68300502), we get a palindrome (88800888).

The spelling of 20500386 in words is "twenty million, five hundred thousand, three hundred eighty-six".