21110420324 has 12 divisors (see below), whose sum is σ = 42220840704. Its totient is φ = 9047322984.

The previous prime is 21110420321. The next prime is 21110420333. The reversal of 21110420324 is 42302401112.

21110420324 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21110420296 and 21110420305.

It is not an unprimeable number, because it can be changed into a prime (21110420321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376971764 + ... + 376971819.

It is an arithmetic number, because the mean of its divisors is an integer number (3518403392).

Almost surely, 2^21110420324 is an apocalyptic number.

It is an amenable number.

21110420324 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21110420324 is a wasteful number, since it uses less digits than its factorization.

21110420324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753943594 (or 753943592 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21110420324 its reverse (42302401112), we get a palindrome (63412821436).

The spelling of 21110420324 in words is "twenty-one billion, one hundred ten million, four hundred twenty thousand, three hundred twenty-four".