20000198020 has 24 divisors (see below), whose sum is σ = 45818635968. Its totient is φ = 7272799200.

The previous prime is 20000198011. The next prime is 20000198047. The reversal of 20000198020 is 2089100002.

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 = 20000197982 and 20000198000.

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, 45454776 + ... + 45455215.

It is an arithmetic number, because the mean of its divisors is an integer number (1909109832).

Almost surely, 2^20000198020 is an apocalyptic number.

20000198020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000198020 is an abundant number, since it is smaller than the sum of its proper divisors (25818437948).

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

20000198020 is a wasteful number, since it uses less digits than its factorization.

20000198020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90910011 (or 90910009 counting only the distinct ones).

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

Adding to 20000198020 its reverse (2089100002), we get a palindrome (22089298022).

The spelling of 20000198020 in words is "twenty billion, one hundred ninety-eight thousand, twenty".