18949711 has 16 divisors (see below), whose sum is σ = 21712896. Its totient is φ = 16380000.

The previous prime is 18949681. The next prime is 18949717. The reversal of 18949711 is 11794981.

It is a cyclic number.

It is not a de Polignac number, because 18949711 - 2¹⁵ = 18916943 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18949717) 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 15 ways as a sum of consecutive naturals, for example, 20346 + ... + 21256.

It is an arithmetic number, because the mean of its divisors is an integer number (1357056).

Almost surely, 2^18949711 is an apocalyptic number.

18949711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18949711 is a deficient number, since it is larger than the sum of its proper divisors (2763185).

18949711 is a wasteful number, since it uses less digits than its factorization.

18949711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014.

The product of its digits is 18144, while the sum is 40.

The square root of 18949711 is about 4353.1265775302. The cubic root of 18949711 is about 266.6045336145.

The spelling of 18949711 in words is "eighteen million, nine hundred forty-nine thousand, seven hundred eleven".