18019345730 has 8 divisors (see below), whose sum is σ = 32434822332. Its totient is φ = 7207738288.

The previous prime is 18019345709. The next prime is 18019345739. The reversal of 18019345730 is 3754391081.

It can be written as a sum of positive squares in 2 ways, for example, as 16628876209 + 1390469521 = 128953^2 + 37289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18019345739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900967277 + ... + 900967296.

Almost surely, 2^18019345730 is an apocalyptic number.

18019345730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18019345730 is a deficient number, since it is larger than the sum of its proper divisors (14415476602).

18019345730 is a wasteful number, since it uses less digits than its factorization.

18019345730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801934580.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 18019345730 in words is "eighteen billion, nineteen million, three hundred forty-five thousand, seven hundred thirty".