20428077 has 8 divisors (see below), whose sum is σ = 27452416. Its totient is φ = 13511232.

The previous prime is 20428069. The next prime is 20428141. The reversal of 20428077 is 77082402.

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

It is not a de Polignac number, because 20428077 - 2³ = 20428069 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 (20428007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26428 + ... + 27189.

It is an arithmetic number, because the mean of its divisors is an integer number (3431552).

Almost surely, 2^20428077 is an apocalyptic number.

It is an amenable number.

20428077 is a deficient number, since it is larger than the sum of its proper divisors (7024339).

20428077 is a wasteful number, since it uses less digits than its factorization.

20428077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53747.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 20428077 is about 4519.7430236685. The cubic root of 20428077 is about 273.3647394345.

The spelling of 20428077 in words is "twenty million, four hundred twenty-eight thousand, seventy-seven".