20055477 has 8 divisors (see below), whose sum is σ = 28797664. Its totient is φ = 12341808.

The previous prime is 20055473. The next prime is 20055479. The reversal of 20055477 is 77455002.

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

It is not a de Polignac number, because 20055477 - 2² = 20055473 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 (20055473) 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 7 ways as a sum of consecutive naturals, for example, 257083 + ... + 257160.

It is an arithmetic number, because the mean of its divisors is an integer number (3599708).

Almost surely, 2^20055477 is an apocalyptic number.

It is an amenable number.

20055477 is a deficient number, since it is larger than the sum of its proper divisors (8742187).

20055477 is a wasteful number, since it uses less digits than its factorization.

20055477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514259.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 20055477 is about 4478.3341769010. The cubic root of 20055477 is about 271.6925095334.

The spelling of 20055477 in words is "twenty million, fifty-five thousand, four hundred seventy-seven".