920840815957331 has 4 divisors (see below), whose sum is σ = 920864444869464. Its totient is φ = 920817187045200.

The previous prime is 920840815957297. The next prime is 920840815957417. The reversal of 920840815957331 is 133759518048029.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 920840815957331 - 2⁶ = 920840815957267 is a prime.

It is a super-2 number, since 2×920840815957331² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920840815957031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11814397610 + ... + 11814475551.

It is an arithmetic number, because the mean of its divisors is an integer number (230216111217366).

Almost surely, 2^{920840815957331} is an apocalyptic number.

920840815957331 is a deficient number, since it is larger than the sum of its proper divisors (23628912133).

920840815957331 is a wasteful number, since it uses less digits than its factorization.

920840815957331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23628912132.

The product of its (nonzero) digits is 65318400, while the sum is 65.

The spelling of 920840815957331 in words is "nine hundred twenty trillion, eight hundred forty billion, eight hundred fifteen million, nine hundred fifty-seven thousand, three hundred thirty-one".