18027641788 has 24 divisors (see below), whose sum is σ = 35763339920. Its totient is φ = 7882531200.

The previous prime is 18027641783. The next prime is 18027641837. The reversal of 18027641788 is 88714672081.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18027641783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9122313 + ... + 9124288.

Almost surely, 2^18027641788 is an apocalyptic number.

It is an amenable number.

18027641788 is a deficient number, since it is larger than the sum of its proper divisors (17735698132).

18027641788 is a wasteful number, since it uses less digits than its factorization.

18027641788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18246637 (or 18246635 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 52.

The spelling of 18027641788 in words is "eighteen billion, twenty-seven million, six hundred forty-one thousand, seven hundred eighty-eight".