20375911 has 4 divisors (see below), whose sum is σ = 21574512. Its totient is φ = 19177312.

The previous prime is 20375909. The next prime is 20375921. The reversal of 20375911 is 11957302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20375911 - 2¹ = 20375909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20375911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20375921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599275 + ... + 599308.

It is an arithmetic number, because the mean of its divisors is an integer number (5393628).

Almost surely, 2^20375911 is an apocalyptic number.

20375911 is a deficient number, since it is larger than the sum of its proper divisors (1198601).

20375911 is a wasteful number, since it uses less digits than its factorization.

20375911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198600.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 20375911 is about 4513.9684314359. The cubic root of 20375911 is about 273.1318491685.

The spelling of 20375911 in words is "twenty million, three hundred seventy-five thousand, nine hundred eleven".