20413525515513 has 32 divisors (see below), whose sum is σ = 30587271536640. Its totient is φ = 12015548424000.

The previous prime is 20413525515491. The next prime is 20413525515533. The reversal of 20413525515513 is 31551552531402.

It is not a de Polignac number, because 20413525515513 - 2⁹ = 20413525515001 is a prime.

It is a super-3 number, since 3×20413525515513³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20413525515533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24963888 + ... + 25768638.

It is an arithmetic number, because the mean of its divisors is an integer number (955852235520).

Almost surely, 2^{20413525515513} is an apocalyptic number.

20413525515513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20413525515513 is a deficient number, since it is larger than the sum of its proper divisors (10173746021127).

20413525515513 is a wasteful number, since it uses less digits than its factorization.

20413525515513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833069.

The product of its (nonzero) digits is 450000, while the sum is 42.

The spelling of 20413525515513 in words is "twenty trillion, four hundred thirteen billion, five hundred twenty-five million, five hundred fifteen thousand, five hundred thirteen".