18956055 has 16 divisors (see below), whose sum is σ = 30828384. Its totient is φ = 9943680.

The previous prime is 18956009. The next prime is 18956057. The reversal of 18956055 is 55065981.

It is not a de Polignac number, because 18956055 - 2¹⁸ = 18693911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18956057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9444 + ... + 11273.

It is an arithmetic number, because the mean of its divisors is an integer number (1926774).

Almost surely, 2^18956055 is an apocalyptic number.

18956055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18956055 is a deficient number, since it is larger than the sum of its proper divisors (11872329).

18956055 is a wasteful number, since it uses less digits than its factorization.

18956055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20786.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 18956055 is about 4353.8551882211. The cubic root of 18956055 is about 266.6342816575.

The spelling of 18956055 in words is "eighteen million, nine hundred fifty-six thousand, fifty-five".