18017690652 has 384 divisors, whose sum is σ = 57001190400. Its totient is φ = 4861181952.

The previous prime is 18017690651. The next prime is 18017690657. The reversal of 18017690652 is 25609671081.

It is a junction number, because it is equal to n+sod(n) for n = 18017690598 and 18017690607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18017690651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 30383668 + ... + 30384260.

It is an arithmetic number, because the mean of its divisors is an integer number (148440600).

Almost surely, 2^18017690652 is an apocalyptic number.

18017690652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18017690652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28500595200).

18017690652 is an abundant number, since it is smaller than the sum of its proper divisors (38983499748).

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

18017690652 is a wasteful number, since it uses less digits than its factorization.

18017690652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 18017690652 in words is "eighteen billion, seventeen million, six hundred ninety thousand, six hundred fifty-two".