18675780901 has 4 divisors (see below), whose sum is σ = 18678508992. Its totient is φ = 18673052812.

The previous prime is 18675780889. The next prime is 18675780919. The reversal of 18675780901 is 10908757681.

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: 10908757681 = 157 ⋅69482533.

It is a cyclic number.

It is not a de Polignac number, because 18675780901 - 2¹¹ = 18675778853 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 (18675780961) 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, 1353751 + ... + 1367476.

It is an arithmetic number, because the mean of its divisors is an integer number (4669627248).

Almost surely, 2^18675780901 is an apocalyptic number.

It is an amenable number.

18675780901 is a deficient number, since it is larger than the sum of its proper divisors (2728091).

18675780901 is an equidigital number, since it uses as much as digits as its factorization.

18675780901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728090.

The product of its (nonzero) digits is 846720, while the sum is 52.

The spelling of 18675780901 in words is "eighteen billion, six hundred seventy-five million, seven hundred eighty thousand, nine hundred one".