11505450521420 has 24 divisors (see below), whose sum is σ = 24248671543824. Its totient is φ = 4585565837376.

The previous prime is 11505450521407. The next prime is 11505450521429. The reversal of 11505450521420 is 2412505450511.

It is not an unprimeable number, because it can be changed into a prime (11505450521429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038392522 + ... + 1038403601.

It is an arithmetic number, because the mean of its divisors is an integer number (1010361314326).

Almost surely, 2^{11505450521420} is an apocalyptic number.

11505450521420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11505450521420 is an abundant number, since it is smaller than the sum of its proper divisors (12743221022404).

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

11505450521420 is a wasteful number, since it uses less digits than its factorization.

11505450521420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076796409 (or 2076796407 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 35.

Adding to 11505450521420 its reverse (2412505450511), we get a palindrome (13917955971931).

The spelling of 11505450521420 in words is "eleven trillion, five hundred five billion, four hundred fifty million, five hundred twenty-one thousand, four hundred twenty".