18645941073 has 8 divisors (see below), whose sum is σ = 24879995008. Its totient is φ = 12421257264.

The previous prime is 18645941057. The next prime is 18645941081. The reversal of 18645941073 is 37014954681.

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

It is not a de Polignac number, because 18645941073 - 2⁴ = 18645941057 is a prime.

It is a super-2 number, since 2×18645941073² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18645941273) 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, 2337886 + ... + 2345847.

It is an arithmetic number, because the mean of its divisors is an integer number (3109999376).

Almost surely, 2^18645941073 is an apocalyptic number.

It is an amenable number.

18645941073 is a deficient number, since it is larger than the sum of its proper divisors (6234053935).

18645941073 is a wasteful number, since it uses less digits than its factorization.

18645941073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4685063.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 18645941073 in words is "eighteen billion, six hundred forty-five million, nine hundred forty-one thousand, seventy-three".