20354506042413 has 4 divisors (see below), whose sum is σ = 27139341389888. Its totient is φ = 13569670694940.

The previous prime is 20354506042337. The next prime is 20354506042517. The reversal of 20354506042413 is 31424060545302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20354506042413 - 2⁴⁰ = 19254994414637 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 (70354506042413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3392417673733 + ... + 3392417673738.

It is an arithmetic number, because the mean of its divisors is an integer number (6784835347472).

Almost surely, 2^{20354506042413} is an apocalyptic number.

It is an amenable number.

20354506042413 is a deficient number, since it is larger than the sum of its proper divisors (6784835347475).

20354506042413 is an equidigital number, since it uses as much as digits as its factorization.

20354506042413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6784835347474.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 20354506042413 its reverse (31424060545302), we get a palindrome (51778566587715).

The spelling of 20354506042413 in words is "twenty trillion, three hundred fifty-four billion, five hundred six million, forty-two thousand, four hundred thirteen".