20840000315 has 4 divisors (see below), whose sum is σ = 25008000384. Its totient is φ = 16672000248.

The previous prime is 20840000257. The next prime is 20840000317. The reversal of 20840000315 is 51300004802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51300004802 = 2 ⋅25650002401.

It is a cyclic number.

It is not a de Polignac number, because 20840000315 - 2¹⁰ = 20839999291 is a prime.

It is a super-2 number, since 2×20840000315² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20840000317) 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, 2084000027 + ... + 2084000036.

It is an arithmetic number, because the mean of its divisors is an integer number (6252000096).

Almost surely, 2^20840000315 is an apocalyptic number.

20840000315 is a deficient number, since it is larger than the sum of its proper divisors (4168000069).

20840000315 is an equidigital number, since it uses as much as digits as its factorization.

20840000315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168000068.

The product of its (nonzero) digits is 960, while the sum is 23.

The spelling of 20840000315 in words is "twenty billion, eight hundred forty million, three hundred fifteen", and thus it is an aban number.