102020209944 has 32 divisors (see below), whose sum is σ = 256259307840. Its totient is φ = 33845565600.

The previous prime is 102020209943. The next prime is 102020210053. The reversal of 102020209944 is 449902020201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020209943) by changing a digit.

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, 10068022 + ... + 10078149.

It is an arithmetic number, because the mean of its divisors is an integer number (8008103370).

Almost surely, 2^102020209944 is an apocalyptic number.

It is an amenable number.

102020209944 is an abundant number, since it is smaller than the sum of its proper divisors (154239097896).

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

102020209944 is a wasteful number, since it uses less digits than its factorization.

102020209944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20146391 (or 20146387 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 102020209944 in words is "one hundred two billion, twenty million, two hundred nine thousand, nine hundred forty-four".