18281905349050 has 24 divisors (see below), whose sum is σ = 38862107371296. Its totient is φ = 6268081833840.

The previous prime is 18281905349023. The next prime is 18281905349117. The reversal of 18281905349050 is 5094350918281.

It is a junction number, because it is equal to n+sod(n) for n = 18281905348982 and 18281905349000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26117007292 + ... + 26117007991.

It is an arithmetic number, because the mean of its divisors is an integer number (1619254473804).

Almost surely, 2^{18281905349050} is an apocalyptic number.

18281905349050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18281905349050 is an abundant number, since it is smaller than the sum of its proper divisors (20580202022246).

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

18281905349050 is a wasteful number, since it uses less digits than its factorization.

18281905349050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52234015302 (or 52234015297 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 18281905349050 in words is "eighteen trillion, two hundred eighty-one billion, nine hundred five million, three hundred forty-nine thousand, fifty".