18936955 has 4 divisors (see below), whose sum is σ = 22724352. Its totient is φ = 15149560.

The previous prime is 18936923. The next prime is 18936979. The reversal of 18936955 is 55963981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55963981 = 47 ⋅1190723.

It is not a de Polignac number, because 18936955 - 2⁵ = 18936923 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1893691 + ... + 1893700.

It is an arithmetic number, because the mean of its divisors is an integer number (5681088).

Almost surely, 2^18936955 is an apocalyptic number.

18936955 is a deficient number, since it is larger than the sum of its proper divisors (3787397).

18936955 is an equidigital number, since it uses as much as digits as its factorization.

18936955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787396.

The product of its digits is 291600, while the sum is 46.

The square root of 18936955 is about 4351.6611770679. The cubic root of 18936955 is about 266.5446985630.

It can be divided in two parts, 18936 and 955, that added together give a palindrome (19891).

The spelling of 18936955 in words is "eighteen million, nine hundred thirty-six thousand, nine hundred fifty-five".