18361780490352 has 80 divisors (see below), whose sum is σ = 51111625396608. Its totient is φ = 5646658563840.

The previous prime is 18361780490351. The next prime is 18361780490371. The reversal of 18361780490352 is 25309408716381.

It is a junction number, because it is equal to n+sod(n) for n = 18361780490292 and 18361780490301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18361780490351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6994158 + ... + 9254285.

It is a 1-persistent number, because it is pandigital, but 2⋅18361780490352 = 36723560980704 is not.

Almost surely, 2^{18361780490352} is an apocalyptic number.

18361780490352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18361780490352 is an abundant number, since it is smaller than the sum of its proper divisors (32749844906256).

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

18361780490352 is a wasteful number, since it uses less digits than its factorization.

18361780490352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16250278 (or 16250272 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 18361780490352 in words is "eighteen trillion, three hundred sixty-one billion, seven hundred eighty million, four hundred ninety thousand, three hundred fifty-two".