18200957780 has 54 divisors (see below), whose sum is σ = 38744694702. Its totient is φ = 7182159360.

The previous prime is 18200957669. The next prime is 18200957807. The reversal of 18200957780 is 8775900281.

It can be written as a sum of positive squares in 3 ways, for example, as 1301477776 + 16899480004 = 36076^2 + 129998^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 58523825 + ... + 58524135.

Almost surely, 2^18200957780 is an apocalyptic number.

18200957780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18200957780 is an abundant number, since it is smaller than the sum of its proper divisors (20543736922).

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

18200957780 is an frugal number, since it uses more digits than its factorization.

18200957780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 47.

The spelling of 18200957780 in words is "eighteen billion, two hundred million, nine hundred fifty-seven thousand, seven hundred eighty".