20287036 has 24 divisors (see below), whose sum is σ = 44263296. Its totient is φ = 7903920.

The previous prime is 20286977. The next prime is 20287039. The reversal of 20287036 is 63078202.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 20286995 and 20287013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20287039) 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, 32626 + ... + 33241.

It is an arithmetic number, because the mean of its divisors is an integer number (1844304).

Almost surely, 2^20287036 is an apocalyptic number.

It is an amenable number.

20287036 is an abundant number, since it is smaller than the sum of its proper divisors (23976260).

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

20287036 is a wasteful number, since it uses less digits than its factorization.

20287036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65889 (or 65887 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20287036 is about 4504.1132312587. The cubic root of 20287036 is about 272.7341577925.

The spelling of 20287036 in words is "twenty million, two hundred eighty-seven thousand, thirty-six".