18453065780 has 24 divisors (see below), whose sum is σ = 38760436008. Its totient is φ = 7379512448.

The previous prime is 18453065773. The next prime is 18453065789. The reversal of 18453065780 is 8756035481.

It can be written as a sum of positive squares in 4 ways, for example, as 5384917924 + 13068147856 = 73382^2 + 114316^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18453065789) 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, 16979 + ... + 192858.

It is an arithmetic number, because the mean of its divisors is an integer number (1615018167).

Almost surely, 2^18453065780 is an apocalyptic number.

18453065780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18453065780 is an abundant number, since it is smaller than the sum of its proper divisors (20307370228).

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

18453065780 is a wasteful number, since it uses less digits than its factorization.

18453065780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214243 (or 214241 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 18453065780 in words is "eighteen billion, four hundred fifty-three million, sixty-five thousand, seven hundred eighty".