901009020 has 24 divisors (see below), whose sum is σ = 2522825424. Its totient is φ = 240269056.

The previous prime is 901009009. The next prime is 901009037. The reversal of 901009020 is 20900109.

It is a happy number.

It is a congruent number.

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, 7508349 + ... + 7508468.

It is an arithmetic number, because the mean of its divisors is an integer number (105117726).

Almost surely, 2^901009020 is an apocalyptic number.

It is an amenable number.

901009020 is an abundant number, since it is smaller than the sum of its proper divisors (1621816404).

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

901009020 is a wasteful number, since it uses less digits than its factorization.

901009020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15016829 (or 15016827 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 901009020 is about 30016.8122891156. The cubic root of 901009020 is about 965.8500639600.

Adding to 901009020 its reverse (20900109), we get a palindrome (921909129).

The spelling of 901009020 in words is "nine hundred one million, nine thousand, twenty".