20411012016520 has 64 divisors (see below), whose sum is σ = 45981152179200. Its totient is φ = 8154387210240.

The previous prime is 20411012016463. The next prime is 20411012016523. The reversal of 20411012016520 is 2561021011402.

It is not an unprimeable number, because it can be changed into a prime (20411012016523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144761416 + ... + 144902344.

It is an arithmetic number, because the mean of its divisors is an integer number (718455502800).

Almost surely, 2^{20411012016520} is an apocalyptic number.

20411012016520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20411012016520 is an abundant number, since it is smaller than the sum of its proper divisors (25570140162680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20411012016520 is a wasteful number, since it uses less digits than its factorization.

20411012016520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145358 (or 145354 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 20411012016520 its reverse (2561021011402), we get a palindrome (22972033027922).

The spelling of 20411012016520 in words is "twenty trillion, four hundred eleven billion, twelve million, sixteen thousand, five hundred twenty".