10020019820 has 24 divisors (see below), whose sum is σ = 21386995728. Its totient is φ = 3942302400.

The previous prime is 10020019811. The next prime is 10020019871. The reversal of 10020019820 is 2891002001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4105346 + ... + 4107785.

It is an arithmetic number, because the mean of its divisors is an integer number (891124822).

Almost surely, 2^10020019820 is an apocalyptic number.

10020019820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10020019820 is an abundant number, since it is smaller than the sum of its proper divisors (11366975908).

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

10020019820 is a wasteful number, since it uses less digits than its factorization.

10020019820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8213201 (or 8213199 counting only the distinct ones).

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

The spelling of 10020019820 in words is "ten billion, twenty million, nineteen thousand, eight hundred twenty".