920840520840 has 32 divisors (see below), whose sum is σ = 2762521562880. Its totient is φ = 245557472192.

The previous prime is 920840520833. The next prime is 920840520883. The reversal of 920840520840 is 48025048029.

It is a junction number, because it is equal to n+sod(n) for n = 920840520792 and 920840520801.

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 7 ways as a sum of consecutive naturals, for example, 3836835384 + ... + 3836835623.

It is an arithmetic number, because the mean of its divisors is an integer number (86328798840).

Almost surely, 2^920840520840 is an apocalyptic number.

It is an amenable number.

920840520840 is an abundant number, since it is smaller than the sum of its proper divisors (1841681042040).

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

920840520840 is a wasteful number, since it uses less digits than its factorization.

920840520840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673671021 (or 7673671017 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

Adding to 920840520840 its reverse (48025048029), we get a palindrome (968865568869).

The spelling of 920840520840 in words is "nine hundred twenty billion, eight hundred forty million, five hundred twenty thousand, eight hundred forty".