10115312020 has 36 divisors (see below), whose sum is σ = 23348820852. Its totient is φ = 3678294400.

The previous prime is 10115311991. The next prime is 10115312029. The reversal of 10115312020 is 2021351101.

It can be written as a sum of positive squares in 2 ways, for example, as 4693346064 + 5421965956 = 68508^2 + 73634^2 .

It is a junction number, because it is equal to n+sod(n) for n = 10115311985 and 10115312003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10115312029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2087521 + ... + 2092360.

It is an arithmetic number, because the mean of its divisors is an integer number (648578357).

Almost surely, 2^10115312020 is an apocalyptic number.

10115312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10115312020 is an abundant number, since it is smaller than the sum of its proper divisors (13233508832).

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

10115312020 is a wasteful number, since it uses less digits than its factorization.

10115312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179912 (or 4179899 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 10115312020 its reverse (2021351101), we get a palindrome (12136663121).

The spelling of 10115312020 in words is "ten billion, one hundred fifteen million, three hundred twelve thousand, twenty".