21050011424 has 48 divisors (see below), whose sum is σ = 46570531392. Its totient is φ = 9292977408.

The previous prime is 21050011393. The next prime is 21050011483. The reversal of 21050011424 is 42411005012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21050011396 and 21050011405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1090454 + ... + 1109589.

It is an arithmetic number, because the mean of its divisors is an integer number (970219404).

Almost surely, 2^21050011424 is an apocalyptic number.

It is an amenable number.

21050011424 is an abundant number, since it is smaller than the sum of its proper divisors (25520519968).

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

21050011424 is a wasteful number, since it uses less digits than its factorization.

21050011424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200089 (or 2200081 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 21050011424 its reverse (42411005012), we get a palindrome (63461016436).

The spelling of 21050011424 in words is "twenty-one billion, fifty million, eleven thousand, four hundred twenty-four".