18777109001 has 4 divisors (see below), whose sum is σ = 21459553152. Its totient is φ = 16094664852.

The previous prime is 18777108953. The next prime is 18777109019. The reversal of 18777109001 is 10090177781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10090177781 = 83 ⋅121568407.

It is not a de Polignac number, because 18777109001 - 2¹⁴ = 18777092617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18777109001.

It is not an unprimeable number, because it can be changed into a prime (18777109301) 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, 1341222065 + ... + 1341222078.

It is an arithmetic number, because the mean of its divisors is an integer number (5364888288).

Almost surely, 2^18777109001 is an apocalyptic number.

It is an amenable number.

18777109001 is a deficient number, since it is larger than the sum of its proper divisors (2682444151).

18777109001 is an equidigital number, since it uses as much as digits as its factorization.

18777109001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2682444150.

The product of its (nonzero) digits is 24696, while the sum is 41.

The spelling of 18777109001 in words is "eighteen billion, seven hundred seventy-seven million, one hundred nine thousand, one".