18088811 has 4 divisors (see below), whose sum is σ = 19480272. Its totient is φ = 16697352.

The previous prime is 18088801. The next prime is 18088823. The reversal of 18088811 is 11888081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11888081 = 43 ⋅276467.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18088811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18088801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695711 + ... + 695736.

It is an arithmetic number, because the mean of its divisors is an integer number (4870068).

Almost surely, 2^18088811 is an apocalyptic number.

18088811 is a deficient number, since it is larger than the sum of its proper divisors (1391461).

18088811 is a wasteful number, since it uses less digits than its factorization.

18088811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391460.

The product of its (nonzero) digits is 4096, while the sum is 35.

The square root of 18088811 is about 4253.0942853410. The cubic root of 18088811 is about 262.5044522299.

The spelling of 18088811 in words is "eighteen million, eighty-eight thousand, eight hundred eleven".