198020020 has 24 divisors (see below), whose sum is σ = 453646368. Its totient is φ = 72007200.

The previous prime is 198019979. The next prime is 198020021. The reversal of 198020020 is 20020891.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 198019973 and 198020000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198020021) 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, 449826 + ... + 450265.

It is an arithmetic number, because the mean of its divisors is an integer number (18901932).

Almost surely, 2^198020020 is an apocalyptic number.

198020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198020020 is an abundant number, since it is smaller than the sum of its proper divisors (255626348).

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

198020020 is a wasteful number, since it uses less digits than its factorization.

198020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900111 (or 900109 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 198020020 is about 14071.9586412127. The cubic root of 198020020 is about 582.8673117882.

The spelling of 198020020 in words is "one hundred ninety-eight million, twenty thousand, twenty".