20421124324 has 24 divisors (see below), whose sum is σ = 36580088160. Its totient is φ = 9969826944.

The previous prime is 20421124307. The next prime is 20421124331. The reversal of 20421124324 is 42342112402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553692 + ... + 589420.

It is an arithmetic number, because the mean of its divisors is an integer number (1524170340).

Almost surely, 2^20421124324 is an apocalyptic number.

It is an amenable number.

20421124324 is a deficient number, since it is larger than the sum of its proper divisors (16158963836).

20421124324 is a wasteful number, since it uses less digits than its factorization.

20421124324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39099 (or 39097 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20421124324 its reverse (42342112402), we get a palindrome (62763236726).

The spelling of 20421124324 in words is "twenty billion, four hundred twenty-one million, one hundred twenty-four thousand, three hundred twenty-four".