18031822644 has 48 divisors (see below), whose sum is σ = 46203204096. Its totient is φ = 5427996000.

The previous prime is 18031822603. The next prime is 18031822703. The reversal of 18031822644 is 44622813081.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432402 + ... + 472265.

It is an arithmetic number, because the mean of its divisors is an integer number (962566752).

Almost surely, 2^18031822644 is an apocalyptic number.

It is an amenable number.

18031822644 is an abundant number, since it is smaller than the sum of its proper divisors (28171381452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18031822644 is a wasteful number, since it uses less digits than its factorization.

18031822644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904836 (or 904834 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The spelling of 18031822644 in words is "eighteen billion, thirty-one million, eight hundred twenty-two thousand, six hundred forty-four".