20285938 has 16 divisors (see below), whose sum is σ = 31379040. Its totient is φ = 9830016.

The previous prime is 20285933. The next prime is 20285963. The reversal of 20285938 is 83958202.

It is a junction number, because it is equal to n+sod(n) for n = 20285897 and 20285906.

It is not an unprimeable number, because it can be changed into a prime (20285933) 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, 11106 + ... + 12802.

It is an arithmetic number, because the mean of its divisors is an integer number (1961190).

Almost surely, 2^20285938 is an apocalyptic number.

20285938 is a deficient number, since it is larger than the sum of its proper divisors (11093102).

20285938 is a wasteful number, since it uses less digits than its factorization.

20285938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 20285938 is about 4503.9913410219. The cubic root of 20285938 is about 272.7292372855.

The spelling of 20285938 in words is "twenty million, two hundred eighty-five thousand, nine hundred thirty-eight".