11421506520 has 128 divisors (see below), whose sum is σ = 39727065600. Its totient is φ = 2913305472.

The previous prime is 11421506501. The next prime is 11421506573. The reversal of 11421506520 is 2560512411.

11421506520 is a `hidden beast` number, since 1 + 1 + 4 + 2 + 1 + 5 + 0 + 652 + 0 = 666.

11421506520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11421506520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205062 + ... + 254741.

It is an arithmetic number, because the mean of its divisors is an integer number (310367700).

Almost surely, 2^11421506520 is an apocalyptic number.

11421506520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11421506520 is an abundant number, since it is smaller than the sum of its proper divisors (28305559080).

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

11421506520 is a wasteful number, since it uses less digits than its factorization.

11421506520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459846 (or 459836 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 11421506520 in words is "eleven billion, four hundred twenty-one million, five hundred six thousand, five hundred twenty".