18195745340 has 24 divisors (see below), whose sum is σ = 38213849520. Its totient is φ = 7277767808.

The previous prime is 18195745273. The next prime is 18195745343. The reversal of 18195745340 is 4354759181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18195745343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364616 + ... + 411504.

It is an arithmetic number, because the mean of its divisors is an integer number (1592243730).

Almost surely, 2^18195745340 is an apocalyptic number.

18195745340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18195745340 is an abundant number, since it is smaller than the sum of its proper divisors (20018104180).

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

18195745340 is a wasteful number, since it uses less digits than its factorization.

18195745340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66301 (or 66299 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 18195745340 in words is "eighteen billion, one hundred ninety-five million, seven hundred forty-five thousand, three hundred forty".