911903801820 has 48 divisors (see below), whose sum is σ = 2785451614848. Its totient is φ = 221067588160.

The previous prime is 911903801797. The next prime is 911903801827. The reversal of 911903801820 is 28108309119.

911903801820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (911903801827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690835554 + ... + 690836873.

It is an arithmetic number, because the mean of its divisors is an integer number (58030241976).

Almost surely, 2^911903801820 is an apocalyptic number.

It is an amenable number.

911903801820 is an abundant number, since it is smaller than the sum of its proper divisors (1873547813028).

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

911903801820 is a wasteful number, since it uses less digits than its factorization.

911903801820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381672450 (or 1381672448 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The spelling of 911903801820 in words is "nine hundred eleven billion, nine hundred three million, eight hundred one thousand, eight hundred twenty".