18911348 has 6 divisors (see below), whose sum is σ = 33094866. Its totient is φ = 9455672.

The previous prime is 18911339. The next prime is 18911369. The reversal of 18911348 is 84311981.

It can be written as a sum of positive squares in only one way, i.e., 9498724 + 9412624 = 3082^2 + 3068^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2363915 + ... + 2363922.

It is an arithmetic number, because the mean of its divisors is an integer number (5515811).

Almost surely, 2^18911348 is an apocalyptic number.

It is an amenable number.

18911348 is a deficient number, since it is larger than the sum of its proper divisors (14183518).

18911348 is a wasteful number, since it uses less digits than its factorization.

18911348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4727841 (or 4727839 counting only the distinct ones).

The product of its digits is 6912, while the sum is 35.

The square root of 18911348 is about 4348.7179720005. The cubic root of 18911348 is about 266.4245016798.

The spelling of 18911348 in words is "eighteen million, nine hundred eleven thousand, three hundred forty-eight".