920331730845440 has 144 divisors (see below), whose sum is σ = 2320927357633920. Its totient is φ = 348694181498880.

The previous prime is 920331730845431. The next prime is 920331730845481. The reversal of 920331730845440 is 44548037133029.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131092967 + ... + 137934873.

It is an arithmetic number, because the mean of its divisors is an integer number (16117551094680).

Almost surely, 2^{920331730845440} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 920331730845440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1160463678816960).

920331730845440 is an abundant number, since it is smaller than the sum of its proper divisors (1400595626788480).

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

920331730845440 is a wasteful number, since it uses less digits than its factorization.

920331730845440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6847478 (or 6847464 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 53.

Adding to 920331730845440 its reverse (44548037133029), we get a palindrome (964879767978469).

The spelling of 920331730845440 in words is "nine hundred twenty trillion, three hundred thirty-one billion, seven hundred thirty million, eight hundred forty-five thousand, four hundred forty".