18801799 has 4 divisors (see below), whose sum is σ = 18886336. Its totient is φ = 18717264.

The previous prime is 18801791. The next prime is 18801823. The reversal of 18801799 is 99710881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18801799 - 2³ = 18801791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18801791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41934 + ... + 42379.

It is an arithmetic number, because the mean of its divisors is an integer number (4721584).

Almost surely, 2^18801799 is an apocalyptic number.

18801799 is a deficient number, since it is larger than the sum of its proper divisors (84537).

18801799 is an equidigital number, since it uses as much as digits as its factorization.

18801799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84536.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 18801799 is about 4336.1041269785. The cubic root of 18801799 is about 265.9090602505.

It can be divided in two parts, 18801 and 799, that added together give a square (19600 = 140²).

The spelling of 18801799 in words is "eighteen million, eight hundred one thousand, seven hundred ninety-nine".