20108975 has 12 divisors (see below), whose sum is σ = 25288560. Its totient is φ = 15859200.

The previous prime is 20108951. The next prime is 20108981. The reversal of 20108975 is 57980102.

It is not a de Polignac number, because 20108975 - 2¹⁰ = 20107951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3890 + ... + 7439.

It is an arithmetic number, because the mean of its divisors is an integer number (2107380).

Almost surely, 2^20108975 is an apocalyptic number.

20108975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20108975 is a deficient number, since it is larger than the sum of its proper divisors (5179585).

20108975 is a wasteful number, since it uses less digits than its factorization.

20108975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11410 (or 11405 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 20108975 is about 4484.3031788674. The cubic root of 20108975 is about 271.9338750375.

The spelling of 20108975 in words is "twenty million, one hundred eight thousand, nine hundred seventy-five".