18020340742340 has 24 divisors (see below), whose sum is σ = 37844468524800. Its totient is φ = 7207802398688.

The previous prime is 18020340742337. The next prime is 18020340742403. The reversal of 18020340742340 is 4324704302081.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18020340742294 and 18020340742303.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20425862 + ... + 21289821.

It is an arithmetic number, because the mean of its divisors is an integer number (1576852855200).

Almost surely, 2^{18020340742340} is an apocalyptic number.

18020340742340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18020340742340 is an abundant number, since it is smaller than the sum of its proper divisors (19824127782460).

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

18020340742340 is a wasteful number, since it uses less digits than its factorization.

18020340742340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41737291 (or 41737289 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 38.

The spelling of 18020340742340 in words is "eighteen trillion, twenty billion, three hundred forty million, seven hundred forty-two thousand, three hundred forty".