18099358787 has 4 divisors (see below), whose sum is σ = 18406127640. Its totient is φ = 17792589936.

The previous prime is 18099358769. The next prime is 18099358801. The reversal of 18099358787 is 78785399081.

It is a happy number.

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 18099358787 - 2¹⁴ = 18099342403 is a prime.

It is a super-2 number, since 2×18099358787² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18099358747) 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, 153384338 + ... + 153384455.

It is an arithmetic number, because the mean of its divisors is an integer number (4601531910).

Almost surely, 2^18099358787 is an apocalyptic number.

18099358787 is a deficient number, since it is larger than the sum of its proper divisors (306768853).

18099358787 is an equidigital number, since it uses as much as digits as its factorization.

18099358787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306768852.

The product of its (nonzero) digits is 30481920, while the sum is 65.

The spelling of 18099358787 in words is "eighteen billion, ninety-nine million, three hundred fifty-eight thousand, seven hundred eighty-seven".