20340515413 has 4 divisors (see below), whose sum is σ = 20569060620. Its totient is φ = 20111970208.

The previous prime is 20340515369. The next prime is 20340515423. The reversal of 20340515413 is 31451504302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31451504302 = 2 ⋅15725752151.

It can be written as a sum of positive squares in 2 ways, for example, as 4620872529 + 15719642884 = 67977^2 + 125378^2 .

It is a cyclic number.

It is not a de Polignac number, because 20340515413 - 2¹³ = 20340507221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20340515423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114272470 + ... + 114272647.

It is an arithmetic number, because the mean of its divisors is an integer number (5142265155).

Almost surely, 2^20340515413 is an apocalyptic number.

It is an amenable number.

20340515413 is a deficient number, since it is larger than the sum of its proper divisors (228545207).

20340515413 is an equidigital number, since it uses as much as digits as its factorization.

20340515413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228545206.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 20340515413 in words is "twenty billion, three hundred forty million, five hundred fifteen thousand, four hundred thirteen".