18581452340 has 24 divisors (see below), whose sum is σ = 42568418592. Its totient is φ = 6756891680.

The previous prime is 18581452327. The next prime is 18581452391. The reversal of 18581452340 is 4325418581.

It is a congruent number.

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, 42230354 + ... + 42230793.

It is an arithmetic number, because the mean of its divisors is an integer number (1773684108).

Almost surely, 2^18581452340 is an apocalyptic number.

18581452340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18581452340 is an abundant number, since it is smaller than the sum of its proper divisors (23986966252).

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

18581452340 is a wasteful number, since it uses less digits than its factorization.

18581452340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84461167 (or 84461165 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 41.

The spelling of 18581452340 in words is "eighteen billion, five hundred eighty-one million, four hundred fifty-two thousand, three hundred forty".