20413525511305 has 8 divisors (see below), whose sum is σ = 24496255726344. Its totient is φ = 16330803667200.

The previous prime is 20413525511293. The next prime is 20413525511347. The reversal of 20413525511305 is 50311552531402.

It can be written as a sum of positive squares in 4 ways, for example, as 3402165494016 + 17011360017289 = 1844496^2 + 4124483^2 .

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

It is not a de Polignac number, because 20413525511305 - 2²³ = 20413517122697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6420835 + ... + 9058375.

It is an arithmetic number, because the mean of its divisors is an integer number (3062031965793).

Almost surely, 2^{20413525511305} is an apocalyptic number.

It is an amenable number.

20413525511305 is a deficient number, since it is larger than the sum of its proper divisors (4082730215039).

20413525511305 is a wasteful number, since it uses less digits than its factorization.

20413525511305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4185467.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 20413525511305 in words is "twenty trillion, four hundred thirteen billion, five hundred twenty-five million, five hundred eleven thousand, three hundred five".