10131820 has 12 divisors (see below), whose sum is σ = 21276864. Its totient is φ = 4052720.

The previous prime is 10131811. The next prime is 10131833. The reversal of 10131820 is 2813101.

10131820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 10131794 and 10131803.

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, 253276 + ... + 253315.

It is an arithmetic number, because the mean of its divisors is an integer number (1773072).

Almost surely, 2^10131820 is an apocalyptic number.

10131820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10131820 is an abundant number, since it is smaller than the sum of its proper divisors (11145044).

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

10131820 is a wasteful number, since it uses less digits than its factorization.

10131820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506600 (or 506598 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 10131820 is about 3183.0519945486. The cubic root of 10131820 is about 216.3859981852.

Adding to 10131820 its reverse (2813101), we get a palindrome (12944921).

The spelling of 10131820 in words is "ten million, one hundred thirty-one thousand, eight hundred twenty".