18200000020 has 24 divisors (see below), whose sum is σ = 38598420168. Its totient is φ = 7207920000.

The previous prime is 18200000017. The next prime is 18200000083. The reversal of 18200000020 is 2000000281.

It can be written as a sum of positive squares in 4 ways, for example, as 9020060676 + 9179939344 = 94974^2 + 95812^2 .

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, 4502931 + ... + 4506970.

It is an arithmetic number, because the mean of its divisors is an integer number (1608267507).

Almost surely, 2^18200000020 is an apocalyptic number.

18200000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18200000020 is an abundant number, since it is smaller than the sum of its proper divisors (20398420148).

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

18200000020 is a wasteful number, since it uses less digits than its factorization.

18200000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9010011 (or 9010009 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The spelling of 18200000020 in words is "eighteen billion, two hundred million, twenty", and thus it is an aban number.