20838285 has 48 divisors (see below), whose sum is σ = 39312000. Its totient is φ = 10150272.

The previous prime is 20838281. The next prime is 20838317. The reversal of 20838285 is 58283802.

It is not a de Polignac number, because 20838285 - 2² = 20838281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20838281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104616 + ... + 104814.

It is an arithmetic number, because the mean of its divisors is an integer number (819000).

Almost surely, 2^20838285 is an apocalyptic number.

It is an amenable number.

20838285 is a deficient number, since it is larger than the sum of its proper divisors (18473715).

20838285 is a wasteful number, since it uses less digits than its factorization.

20838285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 20838285 is about 4564.8970415553. The cubic root of 20838285 is about 275.1824024051.

The spelling of 20838285 in words is "twenty million, eight hundred thirty-eight thousand, two hundred eighty-five".