10101811820 has 24 divisors (see below), whose sum is σ = 21245926128. Its totient is φ = 4034606400.

The previous prime is 10101811813. The next prime is 10101811843. The reversal of 10101811820 is 2811810101.

10101811820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368846 + ... + 395285.

It is an arithmetic number, because the mean of its divisors is an integer number (885246922).

Almost surely, 2^10101811820 is an apocalyptic number.

10101811820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10101811820 is an abundant number, since it is smaller than the sum of its proper divisors (11144114308).

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

10101811820 is a wasteful number, since it uses less digits than its factorization.

10101811820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764801 (or 764799 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 23.

The spelling of 10101811820 in words is "ten billion, one hundred one million, eight hundred eleven thousand, eight hundred twenty".