201009092820 has 48 divisors (see below), whose sum is σ = 563003931840. Its totient is φ = 53585427456.

The previous prime is 201009092747. The next prime is 201009092831. The reversal of 201009092820 is 28290900102.

It is a happy number.

201009092820 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 339805 + ... + 719364.

It is an arithmetic number, because the mean of its divisors is an integer number (11729248580).

Almost surely, 2^201009092820 is an apocalyptic number.

201009092820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201009092820 is an abundant number, since it is smaller than the sum of its proper divisors (361994839020).

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

201009092820 is a wasteful number, since it uses less digits than its factorization.

201009092820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062344 (or 1062342 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

Adding to 201009092820 its reverse (28290900102), we get a palindrome (229299992922).

The spelling of 201009092820 in words is "two hundred one billion, nine million, ninety-two thousand, eight hundred twenty".