20530340413 has 8 divisors (see below), whose sum is σ = 22440742560. Its totient is φ = 18627272880.

The previous prime is 20530340407. The next prime is 20530340429. The reversal of 20530340413 is 31404303502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20530340413 is a prime.

It is a super-2 number, since 2×20530340413² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530340113) 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 7 ways as a sum of consecutive naturals, for example, 1827795 + ... + 1838992.

It is an arithmetic number, because the mean of its divisors is an integer number (2805092820).

Almost surely, 2^20530340413 is an apocalyptic number.

It is an amenable number.

20530340413 is a deficient number, since it is larger than the sum of its proper divisors (1910402147).

20530340413 is a wasteful number, since it uses less digits than its factorization.

20530340413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667307.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 20530340413 its reverse (31404303502), we get a palindrome (51934643915).

The spelling of 20530340413 in words is "twenty billion, five hundred thirty million, three hundred forty thousand, four hundred thirteen".