20041221424 has 40 divisors (see below), whose sum is σ = 44401943808. Its totient is φ = 8584265280.

The previous prime is 20041221397. The next prime is 20041221427. The reversal of 20041221424 is 42412214002.

It is a junction number, because it is equal to n+sod(n) for n = 20041221395 and 20041221404.

It is not an unprimeable number, because it can be changed into a prime (20041221427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153429 + ... + 252235.

Almost surely, 2^20041221424 is an apocalyptic number.

It is an amenable number.

20041221424 is an abundant number, since it is smaller than the sum of its proper divisors (24360722384).

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

20041221424 is a wasteful number, since it uses less digits than its factorization.

20041221424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100633 (or 100627 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20041221424 its reverse (42412214002), we get a palindrome (62453435426).

The spelling of 20041221424 in words is "twenty billion, forty-one million, two hundred twenty-one thousand, four hundred twenty-four".