20285204 has 6 divisors (see below), whose sum is σ = 35499114. Its totient is φ = 10142600.

The previous prime is 20285099. The next prime is 20285263. The reversal of 20285204 is 40258202.

It can be written as a sum of positive squares in only one way, i.e., 17556100 + 2729104 = 4190^2 + 1652^2 .

It is a super-2 number, since 2×20285204² = 822979002643232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20285204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2535647 + ... + 2535654.

It is an arithmetic number, because the mean of its divisors is an integer number (5916519).

Almost surely, 2^20285204 is an apocalyptic number.

It is an amenable number.

20285204 is a deficient number, since it is larger than the sum of its proper divisors (15213910).

20285204 is a wasteful number, since it uses less digits than its factorization.

20285204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071305 (or 5071303 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 20285204 is about 4503.9098570020. The cubic root of 20285204 is about 272.7259478858.

The spelling of 20285204 in words is "twenty million, two hundred eighty-five thousand, two hundred four".