20054777 has 4 divisors (see below), whose sum is σ = 20596836. Its totient is φ = 19512720.

The previous prime is 20054773. The next prime is 20054803. The reversal of 20054777 is 77745002.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7123561 + 12931216 = 2669^2 + 3596^2 .

It is a cyclic number.

It is not a de Polignac number, because 20054777 - 2² = 20054773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20054773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270974 + ... + 271047.

It is an arithmetic number, because the mean of its divisors is an integer number (5149209).

Almost surely, 2^20054777 is an apocalyptic number.

It is an amenable number.

20054777 is a deficient number, since it is larger than the sum of its proper divisors (542059).

20054777 is an equidigital number, since it uses as much as digits as its factorization.

20054777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542058.

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 20054777 is about 4478.2560221586. The cubic root of 20054777 is about 271.6893485188.

Adding to 20054777 its reverse (77745002), we get a palindrome (97799779).

The spelling of 20054777 in words is "twenty million, fifty-four thousand, seven hundred seventy-seven".