20102838 has 48 divisors (see below), whose sum is σ = 47302704. Its totient is φ = 5678400.

The previous prime is 20102837. The next prime is 20102861. The reversal of 20102838 is 83820102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29356 + ... + 30032.

It is an arithmetic number, because the mean of its divisors is an integer number (985473).

Almost surely, 2^20102838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20102838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23651352).

20102838 is an abundant number, since it is smaller than the sum of its proper divisors (27199866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20102838 is a wasteful number, since it uses less digits than its factorization.

20102838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20102838 is about 4483.6188508837. The cubic root of 20102838 is about 271.9062086515.

The spelling of 20102838 in words is "twenty million, one hundred two thousand, eight hundred thirty-eight".