18750720195 has 24 divisors (see below), whose sum is σ = 32823050832. Its totient is φ = 9901368000.

The previous prime is 18750720193. The next prime is 18750720259. The reversal of 18750720195 is 59102705781.

It is not a de Polignac number, because 18750720195 - 2¹ = 18750720193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18750720195.

It is not an unprimeable number, because it can be changed into a prime (18750720193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2058241 + ... + 2067330.

It is an arithmetic number, because the mean of its divisors is an integer number (1367627118).

Almost surely, 2^18750720195 is an apocalyptic number.

18750720195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18750720195 is a deficient number, since it is larger than the sum of its proper divisors (14072330637).

18750720195 is a wasteful number, since it uses less digits than its factorization.

18750720195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125683 (or 4125680 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 45.

It can be divided in two parts, 187507 and 20195, that added together give a palindrome (207702).

The spelling of 18750720195 in words is "eighteen billion, seven hundred fifty million, seven hundred twenty thousand, one hundred ninety-five".