18780470645 has 8 divisors (see below), whose sum is σ = 22542050304. Its totient is φ = 15020719504.

The previous prime is 18780470629. The next prime is 18780470663. The reversal of 18780470645 is 54607408781.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18780470645 - 2⁴ = 18780470629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18780470593 and 18780470602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434429 + ... + 475698.

It is an arithmetic number, because the mean of its divisors is an integer number (2817756288).

Almost surely, 2^18780470645 is an apocalyptic number.

It is an amenable number.

18780470645 is a deficient number, since it is larger than the sum of its proper divisors (3761579659).

18780470645 is an equidigital number, since it uses as much as digits as its factorization.

18780470645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914259.

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 18780470645 in words is "eighteen billion, seven hundred eighty million, four hundred seventy thousand, six hundred forty-five".