20975927 has 4 divisors (see below), whose sum is σ = 23972496. Its totient is φ = 17979360.

The previous prime is 20975923. The next prime is 20975939. The reversal of 20975927 is 72957902.

It is a happy number.

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

It is not a de Polignac number, because 20975927 - 2² = 20975923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20975923) 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, 1498274 + ... + 1498287.

It is an arithmetic number, because the mean of its divisors is an integer number (5993124).

Almost surely, 2^20975927 is an apocalyptic number.

20975927 is a deficient number, since it is larger than the sum of its proper divisors (2996569).

20975927 is an equidigital number, since it uses as much as digits as its factorization.

20975927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996568.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 20975927 is about 4579.9483621543. The cubic root of 20975927 is about 275.7869557714.

The spelling of 20975927 in words is "twenty million, nine hundred seventy-five thousand, nine hundred twenty-seven".