21050010024 has 16 divisors (see below), whose sum is σ = 52625025120. Its totient is φ = 7016670000.

The previous prime is 21050010013. The next prime is 21050010139. The reversal of 21050010024 is 42001005012.

It is a junction number, because it is equal to n+sod(n) for n = 21050009985 and 21050010012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438541852 + ... + 438541899.

It is an arithmetic number, because the mean of its divisors is an integer number (3289064070).

Almost surely, 2^21050010024 is an apocalyptic number.

21050010024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21050010024 is an abundant number, since it is smaller than the sum of its proper divisors (31575015096).

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

21050010024 is a wasteful number, since it uses less digits than its factorization.

21050010024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877083760 (or 877083756 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 21050010024 its reverse (42001005012), we get a palindrome (63051015036).

The spelling of 21050010024 in words is "twenty-one billion, fifty million, ten thousand, twenty-four".