10205320520 has 16 divisors (see below), whose sum is σ = 22961971260. Its totient is φ = 4082128192.

The previous prime is 10205320483. The next prime is 10205320577. The reversal of 10205320520 is 2502350201.

It can be written as a sum of positive squares in 2 ways, for example, as 10190094916 + 15225604 = 100946^2 + 3902^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 10205320492 and 10205320501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127566467 + ... + 127566546.

Almost surely, 2^10205320520 is an apocalyptic number.

10205320520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10205320520 is an abundant number, since it is smaller than the sum of its proper divisors (12756650740).

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

10205320520 is a wasteful number, since it uses less digits than its factorization.

10205320520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255133024 (or 255133020 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 10205320520 its reverse (2502350201), we get a palindrome (12707670721).

The spelling of 10205320520 in words is "ten billion, two hundred five million, three hundred twenty thousand, five hundred twenty".