920023117440 has 512 divisors, whose sum is σ = 3459388262400. Its totient is φ = 203629510656.

The previous prime is 920023117421. The next prime is 920023117483. The reversal of 920023117440 is 44711320029.

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 63 ways as a sum of consecutive naturals, for example, 53119662 + ... + 53136978.

It is an arithmetic number, because the mean of its divisors is an integer number (6756617700).

Almost surely, 2^920023117440 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 920023117440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1729694131200).

920023117440 is an abundant number, since it is smaller than the sum of its proper divisors (2539365144960).

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

920023117440 is a wasteful number, since it uses less digits than its factorization.

920023117440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17472 (or 17460 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

Adding to 920023117440 its reverse (44711320029), we get a palindrome (964734437469).

The spelling of 920023117440 in words is "nine hundred twenty billion, twenty-three million, one hundred seventeen thousand, four hundred forty".