18135027784 has 8 divisors (see below), whose sum is σ = 34003177110. Its totient is φ = 9067513888.

The previous prime is 18135027761. The next prime is 18135027803. The reversal of 18135027784 is 48772053181.

It can be written as a sum of positive squares in only one way, i.e., 12360547684 + 5774480100 = 111178^2 + 75990^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1133439229 + ... + 1133439244.

Almost surely, 2^18135027784 is an apocalyptic number.

It is an amenable number.

18135027784 is a deficient number, since it is larger than the sum of its proper divisors (15868149326).

18135027784 is a wasteful number, since it uses less digits than its factorization.

18135027784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266878479 (or 2266878475 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 18135027784 in words is "eighteen billion, one hundred thirty-five million, twenty-seven thousand, seven hundred eighty-four".