18949611 has 8 divisors (see below), whose sum is σ = 26752464. Its totient is φ = 11889920.

The previous prime is 18949591. The next prime is 18949633. The reversal of 18949611 is 11694981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18949611 - 2¹⁷ = 18818539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18949611.

It is not an unprimeable number, because it can be changed into a prime (18949681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185730 + ... + 185831.

It is an arithmetic number, because the mean of its divisors is an integer number (3344058).

Almost surely, 2^18949611 is an apocalyptic number.

18949611 is a deficient number, since it is larger than the sum of its proper divisors (7802853).

18949611 is a wasteful number, since it uses less digits than its factorization.

18949611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371581.

The product of its digits is 15552, while the sum is 39.

The square root of 18949611 is about 4353.1150915178. The cubic root of 18949611 is about 266.6040646451.

The spelling of 18949611 in words is "eighteen million, nine hundred forty-nine thousand, six hundred eleven".