20428927 has 8 divisors (see below), whose sum is σ = 20900880. Its totient is φ = 19961280.

The previous prime is 20428909. The next prime is 20428937. The reversal of 20428927 is 72982402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20428927 - 2⁷ = 20428799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20428892 and 20428901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20428937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9723 + ... + 11635.

It is an arithmetic number, because the mean of its divisors is an integer number (2612610).

Almost surely, 2^20428927 is an apocalyptic number.

20428927 is a deficient number, since it is larger than the sum of its proper divisors (471953).

20428927 is a wasteful number, since it uses less digits than its factorization.

20428927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2153.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20428927 is about 4519.8370545850. The cubic root of 20428927 is about 273.3685308960.

The spelling of 20428927 in words is "twenty million, four hundred twenty-eight thousand, nine hundred twenty-seven".