20287270 has 16 divisors (see below), whose sum is σ = 36571248. Its totient is φ = 8102880.

The previous prime is 20287261. The next prime is 20287277. The reversal of 20287270 is 7278202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20287277) 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, 9217 + ... + 11203.

It is an arithmetic number, because the mean of its divisors is an integer number (2285703).

Almost surely, 2^20287270 is an apocalyptic number.

20287270 is a deficient number, since it is larger than the sum of its proper divisors (16283978).

20287270 is a wasteful number, since it uses less digits than its factorization.

20287270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 20287270 is about 4504.1392074402. The cubic root of 20287270 is about 272.7352064022.

The spelling of 20287270 in words is "twenty million, two hundred eighty-seven thousand, two hundred seventy".