18734549373 has 24 divisors (see below), whose sum is σ = 28220119200. Its totient is φ = 12419895888.

The previous prime is 18734549371. The next prime is 18734549377. The reversal of 18734549373 is 37394543781.

18734549373 is a `hidden beast` number, since 1 + 87 + 3 + 4 + 5 + 493 + 73 = 666.

It is not a de Polignac number, because 18734549373 - 2¹ = 18734549371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18734549371) 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, 171858 + ... + 258851.

It is an arithmetic number, because the mean of its divisors is an integer number (1175838300).

Almost surely, 2^18734549373 is an apocalyptic number.

It is an amenable number.

18734549373 is a deficient number, since it is larger than the sum of its proper divisors (9485569827).

18734549373 is an equidigital number, since it uses as much as digits as its factorization.

18734549373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430903 (or 430891 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 54.

The spelling of 18734549373 in words is "eighteen billion, seven hundred thirty-four million, five hundred forty-nine thousand, three hundred seventy-three".