920815803 has 16 divisors (see below), whose sum is σ = 1395898240. Its totient is φ = 599600232.

The previous prime is 920815751. The next prime is 920815811. The reversal of 920815803 is 308518029.

It is not a de Polignac number, because 920815803 - 2¹³ = 920807611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920815823) 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, 395401 + ... + 397722.

It is an arithmetic number, because the mean of its divisors is an integer number (87243640).

Almost surely, 2^920815803 is an apocalyptic number.

920815803 is a deficient number, since it is larger than the sum of its proper divisors (475082437).

920815803 is a wasteful number, since it uses less digits than its factorization.

920815803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793175 (or 793169 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 920815803 is about 30344.9469104825. The cubic root of 920815803 is about 972.8762198680.

The spelling of 920815803 in words is "nine hundred twenty million, eight hundred fifteen thousand, eight hundred three".