18845709460 has 12 divisors (see below), whose sum is σ = 39575989908. Its totient is φ = 7538283776.

The previous prime is 18845709457. The next prime is 18845709461. The reversal of 18845709460 is 6490754881.

It can be written as a sum of positive squares in 2 ways, for example, as 10367719684 + 8477989776 = 101822^2 + 92076^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18845709398 and 18845709407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18845709461) 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, 471142717 + ... + 471142756.

It is an arithmetic number, because the mean of its divisors is an integer number (3297999159).

Almost surely, 2^18845709460 is an apocalyptic number.

18845709460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18845709460 is an abundant number, since it is smaller than the sum of its proper divisors (20730280448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18845709460 is a wasteful number, since it uses less digits than its factorization.

18845709460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942285482 (or 942285480 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 18845709460 in words is "eighteen billion, eight hundred forty-five million, seven hundred nine thousand, four hundred sixty".