20005838 has 16 divisors (see below), whose sum is σ = 32315760. Its totient is φ = 9254016.

The previous prime is 20005829. The next prime is 20005847. The reversal of 20005838 is 83850002.

It is an interprime number because it is at equal distance from previous prime (20005829) and next prime (20005847).

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, 2981 + ... + 6992.

It is an arithmetic number, because the mean of its divisors is an integer number (2019735).

Almost surely, 2^20005838 is an apocalyptic number.

20005838 is a deficient number, since it is larger than the sum of its proper divisors (12309922).

20005838 is a wasteful number, since it uses less digits than its factorization.

20005838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 20005838 is about 4472.7886156178. The cubic root of 20005838 is about 271.4681703735.

The spelling of 20005838 in words is "twenty million, five thousand, eight hundred thirty-eight".