10201820 has 24 divisors (see below), whose sum is σ = 21881664. Its totient is φ = 3993536.

The previous prime is 10201817. The next prime is 10201831. The reversal of 10201820 is 2810201.

It is a junction number, because it is equal to n+sod(n) for n = 10201795 and 10201804.

It is a congruent number.

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, 4487 + ... + 6366.

It is an arithmetic number, because the mean of its divisors is an integer number (911736).

Almost surely, 2^10201820 is an apocalyptic number.

10201820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10201820 is an abundant number, since it is smaller than the sum of its proper divisors (11679844).

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

10201820 is a wasteful number, since it uses less digits than its factorization.

10201820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10909 (or 10907 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 10201820 is about 3194.0288038776. The cubic root of 10201820 is about 216.8831865790.

The spelling of 10201820 in words is "ten million, two hundred one thousand, eight hundred twenty".