18231883647 has 16 divisors (see below), whose sum is σ = 25150919040. Its totient is φ = 11733835232.

The previous prime is 18231883633. The next prime is 18231883651. The reversal of 18231883647 is 74638813281.

It is not a de Polignac number, because 18231883647 - 2⁷ = 18231883519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18231883647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18231885647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1126708 + ... + 1142774.

It is an arithmetic number, because the mean of its divisors is an integer number (1571932440).

Almost surely, 2^18231883647 is an apocalyptic number.

18231883647 is a deficient number, since it is larger than the sum of its proper divisors (6919035393).

18231883647 is a wasteful number, since it uses less digits than its factorization.

18231883647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29142.

The product of its digits is 1548288, while the sum is 51.

The spelling of 18231883647 in words is "eighteen billion, two hundred thirty-one million, eight hundred eighty-three thousand, six hundred forty-seven".