20283885 has 32 divisors (see below), whose sum is σ = 36247680. Its totient is φ = 10761984.

The previous prime is 20283877. The next prime is 20283899. The reversal of 20283885 is 58838202.

It is not a de Polignac number, because 20283885 - 2³ = 20283877 is a prime.

It is a super-2 number, since 2×20283885² = 822871981386450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 46629 + ... + 47061.

It is an arithmetic number, because the mean of its divisors is an integer number (1132740).

Almost surely, 2^20283885 is an apocalyptic number.

It is an amenable number.

20283885 is a deficient number, since it is larger than the sum of its proper divisors (15963795).

20283885 is a wasteful number, since it uses less digits than its factorization.

20283885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 788 counting only the distinct ones).

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

The square root of 20283885 is about 4503.7634262914. The cubic root of 20283885 is about 272.7200366262.

The spelling of 20283885 in words is "twenty million, two hundred eighty-three thousand, eight hundred eighty-five".