20097800 has 36 divisors (see below), whose sum is σ = 46875255. Its totient is φ = 8013760.

The previous prime is 20097793. The next prime is 20097809. The reversal of 20097800 is 879002.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 188356 + 19909444 = 434^2 + 4462^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3170.

It is a self number, because there is not a number n which added to its sum of digits gives 20097800.

It is not an unprimeable number, because it can be changed into a prime (20097809) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63242 + ... + 63558.

Almost surely, 2^20097800 is an apocalyptic number.

20097800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20097800

20097800 is an abundant number, since it is smaller than the sum of its proper divisors (26777455).

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

20097800 is an equidigital number, since it uses as much as digits as its factorization.

20097800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 20097800 is about 4483.0569927227. The cubic root of 20097800 is about 271.8834924903.

The spelling of 20097800 in words is "twenty million, ninety-seven thousand, eight hundred".