20281204 has 24 divisors (see below), whose sum is σ = 37964808. Its totient is φ = 9446400.

The previous prime is 20281199. The next prime is 20281211. The reversal of 20281204 is 40218202.

It can be written as a sum of positive squares in 4 ways, for example, as 14424804 + 5856400 = 3798^2 + 2420^2 .

It is a super-3 number, since 3×20281204³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5392 + ... + 8344.

It is an arithmetic number, because the mean of its divisors is an integer number (1581867).

Almost surely, 2^20281204 is an apocalyptic number.

It is an amenable number.

20281204 is a deficient number, since it is larger than the sum of its proper divisors (17683604).

20281204 is a wasteful number, since it uses less digits than its factorization.

20281204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075 (or 3073 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 20281204 is about 4503.4657764881. The cubic root of 20281204 is about 272.7080206073.

Adding to 20281204 its reverse (40218202), we get a palindrome (60499406).

It can be divided in two parts, 202 and 81204, that added together give a triangular number (81406 = T₄₀₃).

The spelling of 20281204 in words is "twenty million, two hundred eighty-one thousand, two hundred four".