20001838 has 16 divisors (see below), whose sum is σ = 30690576. Its totient is φ = 9774400.

The previous prime is 20001833. The next prime is 20001841. The reversal of 20001838 is 83810002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16170 + ... + 17362.

It is an arithmetic number, because the mean of its divisors is an integer number (1918161).

Almost surely, 2^20001838 is an apocalyptic number.

20001838 is a deficient number, since it is larger than the sum of its proper divisors (10688738).

20001838 is a wasteful number, since it uses less digits than its factorization.

20001838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 20001838 is about 4472.3414449257. The cubic root of 20001838 is about 271.4500765707.

The spelling of 20001838 in words is "twenty million, one thousand, eight hundred thirty-eight".