20503086 has 16 divisors (see below), whose sum is σ = 41223168. Its totient is φ = 6798200.

The previous prime is 20503073. The next prime is 20503099. The reversal of 20503086 is 68030502.

It is an interprime number because it is at equal distance from previous prime (20503073) and next prime (20503099).

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 7 ways as a sum of consecutive naturals, for example, 7800 + ... + 10091.

It is an arithmetic number, because the mean of its divisors is an integer number (2576448).

Almost surely, 2^20503086 is an apocalyptic number.

20503086 is an abundant number, since it is smaller than the sum of its proper divisors (20720082).

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

20503086 is a wasteful number, since it uses less digits than its factorization.

20503086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18087.

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

The square root of 20503086 is about 4528.0333479337. The cubic root of 20503086 is about 273.6989162619.

Adding to 20503086 its reverse (68030502), we get a palindrome (88533588).

The spelling of 20503086 in words is "twenty million, five hundred three thousand, eighty-six".