18200080 has 20 divisors (see below), whose sum is σ = 42315372. Its totient is φ = 7280000.

The previous prime is 18200059. The next prime is 18200087. The reversal of 18200080 is 8000281.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3083536 + 15116544 = 1756^2 + 3888^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (18200087) 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, 113671 + ... + 113830.

Almost surely, 2^18200080 is an apocalyptic number.

18200080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18200080 is an abundant number, since it is smaller than the sum of its proper divisors (24115292).

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

18200080 is a wasteful number, since it uses less digits than its factorization.

18200080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227514 (or 227508 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 18200080 is about 4266.1551776746. The cubic root of 18200080 is about 263.0415968364.

The spelling of 18200080 in words is "eighteen million, two hundred thousand, eighty".