18381254770 has 32 divisors (see below), whose sum is σ = 34599882240. Its totient is φ = 7017531840.

The previous prime is 18381254761. The next prime is 18381254779. The reversal of 18381254770 is 7745218381.

It is an interprime number because it is at equal distance from previous prime (18381254761) and next prime (18381254779).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 18381254770.

It is not an unprimeable number, because it can be changed into a prime (18381254779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19351 + ... + 192709.

It is an arithmetic number, because the mean of its divisors is an integer number (1081246320).

Almost surely, 2^18381254770 is an apocalyptic number.

18381254770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18381254770 is a deficient number, since it is larger than the sum of its proper divisors (16218627470).

18381254770 is a wasteful number, since it uses less digits than its factorization.

18381254770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173850.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 18381254770 in words is "eighteen billion, three hundred eighty-one million, two hundred fifty-four thousand, seven hundred seventy".