20411204245645 has 8 divisors (see below), whose sum is σ = 24735954452760. Its totient is φ = 16167290491200.

The previous prime is 20411204245631. The next prime is 20411204245693. The reversal of 20411204245645 is 54654240211402.

It can be written as a sum of positive squares in 4 ways, for example, as 6101280385929 + 14309923859716 = 2470077^2 + 3782846^2 .

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

It is not a de Polignac number, because 20411204245645 - 2¹⁵ = 20411204212877 is a prime.

It is a super-3 number, since 3×20411204245645³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20411204245598 and 20411204245607.

It is a congruent number.

It is an unprimeable number.

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, 20209112610 + ... + 20209113619.

It is an arithmetic number, because the mean of its divisors is an integer number (3091994306595).

Almost surely, 2^{20411204245645} is an apocalyptic number.

It is an amenable number.

20411204245645 is a deficient number, since it is larger than the sum of its proper divisors (4324750207115).

20411204245645 is a wasteful number, since it uses less digits than its factorization.

20411204245645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40418226335.

The product of its (nonzero) digits is 307200, while the sum is 40.

The spelling of 20411204245645 in words is "twenty trillion, four hundred eleven billion, two hundred four million, two hundred forty-five thousand, six hundred forty-five".