18910349343450 has 288 divisors, whose sum is σ = 51420805839936. Its totient is φ = 4982174023680.

The previous prime is 18910349343377. The next prime is 18910349343463. The reversal of 18910349343450 is 5434394301981.

18910349343450 is a `hidden beast` number, since 1 + 8 + 9 + 103 + 49 + 3 + 43 + 450 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 15589735044 + ... + 15589736256.

It is an arithmetic number, because the mean of its divisors is an integer number (178544464722).

Almost surely, 2^{18910349343450} is an apocalyptic number.

18910349343450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18910349343450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25710402919968).

18910349343450 is an abundant number, since it is smaller than the sum of its proper divisors (32510456496486).

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

18910349343450 is a wasteful number, since it uses less digits than its factorization.

18910349343450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478 (or 2470 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 18910349343450 in words is "eighteen trillion, nine hundred ten billion, three hundred forty-nine million, three hundred forty-three thousand, four hundred fifty".