18941811 has 16 divisors (see below), whose sum is σ = 30119424. Its totient is φ = 10353024.

The previous prime is 18941807. The next prime is 18941849. The reversal of 18941811 is 11814981.

It is not a de Polignac number, because 18941811 - 2² = 18941807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18941861) 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, 19126 + ... + 20091.

It is an arithmetic number, because the mean of its divisors is an integer number (1882464).

Almost surely, 2^18941811 is an apocalyptic number.

18941811 is a deficient number, since it is larger than the sum of its proper divisors (11177613).

18941811 is a wasteful number, since it uses less digits than its factorization.

18941811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39250.

The product of its digits is 2304, while the sum is 33.

The square root of 18941811 is about 4352.2190891544. The cubic root of 18941811 is about 266.5674799523.

The spelling of 18941811 in words is "eighteen million, nine hundred forty-one thousand, eight hundred eleven".