20105928 has 32 divisors (see below), whose sum is σ = 55850400. Its totient is φ = 6701904.

The previous prime is 20105927. The next prime is 20105929. The reversal of 20105928 is 82950102.

It is an interprime number because it is at equal distance from previous prime (20105927) and next prime (20105929).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20105927) 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, 46326 + ... + 46757.

It is an arithmetic number, because the mean of its divisors is an integer number (1745325).

Almost surely, 2^20105928 is an apocalyptic number.

It is an amenable number.

20105928 is an abundant number, since it is smaller than the sum of its proper divisors (35744472).

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

20105928 is a wasteful number, since it uses less digits than its factorization.

20105928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93098 (or 93088 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 20105928 is about 4483.9634253638. The cubic root of 20105928 is about 271.9201394730.

The spelling of 20105928 in words is "twenty million, one hundred five thousand, nine hundred twenty-eight".