20198032520 has 128 divisors (see below), whose sum is σ = 50275922400. Its totient is φ = 7268352000.

The previous prime is 20198032493. The next prime is 20198032577. The reversal of 20198032520 is 2523089102.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 6466411396 + 13731621124 = 80414^2 + 117182^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1986650 + ... + 1996790.

Almost surely, 2^20198032520 is an apocalyptic number.

20198032520 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 20198032520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25137961200).

20198032520 is an abundant number, since it is smaller than the sum of its proper divisors (30077889880).

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

20198032520 is a wasteful number, since it uses less digits than its factorization.

20198032520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10299 (or 10295 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 20198032520 in words is "twenty billion, one hundred ninety-eight million, thirty-two thousand, five hundred twenty".