20110405055520 has 192 divisors, whose sum is σ = 70064484779520. Its totient is φ = 4816462860288.

The previous prime is 20110405055509. The next prime is 20110405055551. The reversal of 20110405055520 is 2555050401102.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43320760 + ... + 43782519.

It is an arithmetic number, because the mean of its divisors is an integer number (364919191560).

Almost surely, 2^{20110405055520} is an apocalyptic number.

20110405055520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110405055520 is an abundant number, since it is smaller than the sum of its proper divisors (49954079724000).

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

20110405055520 is a wasteful number, since it uses less digits than its factorization.

20110405055520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87103347 (or 87103339 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 20110405055520 its reverse (2555050401102), we get a palindrome (22665455456622).

The spelling of 20110405055520 in words is "twenty trillion, one hundred ten billion, four hundred five million, fifty-five thousand, five hundred twenty".