10020091820 has 12 divisors (see below), whose sum is σ = 21042192864. Its totient is φ = 4008036720.

The previous prime is 10020091819. The next prime is 10020091831. The reversal of 10020091820 is 2819002001.

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, 250502276 + ... + 250502315.

It is an arithmetic number, because the mean of its divisors is an integer number (1753516072).

Almost surely, 2^10020091820 is an apocalyptic number.

10020091820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10020091820 is an abundant number, since it is smaller than the sum of its proper divisors (11022101044).

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

10020091820 is a wasteful number, since it uses less digits than its factorization.

10020091820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501004600 (or 501004598 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 10020091820 its reverse (2819002001), we get a palindrome (12839093821).

The spelling of 10020091820 in words is "ten billion, twenty million, ninety-one thousand, eight hundred twenty".