20386055 has 4 divisors (see below), whose sum is σ = 24463272. Its totient is φ = 16308840.

The previous prime is 20386049. The next prime is 20386063. The reversal of 20386055 is 55068302.

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

It is not a de Polignac number, because 20386055 - 2⁴ = 20386039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2038601 + ... + 2038610.

It is an arithmetic number, because the mean of its divisors is an integer number (6115818).

Almost surely, 2^20386055 is an apocalyptic number.

20386055 is a deficient number, since it is larger than the sum of its proper divisors (4077217).

20386055 is an equidigital number, since it uses as much as digits as its factorization.

20386055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4077216.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 20386055 is about 4515.0919149005. The cubic root of 20386055 is about 273.1771672212.

The spelling of 20386055 in words is "twenty million, three hundred eighty-six thousand, fifty-five".