204211021424 has 80 divisors (see below), whose sum is σ = 430232463360. Its totient is φ = 93542688000.

The previous prime is 204211021409. The next prime is 204211021439. The reversal of 204211021424 is 424120112402.

It is an interprime number because it is at equal distance from previous prime (204211021409) and next prime (204211021439).

It is a self number, because there is not a number n which added to its sum of digits gives 204211021424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14232494 + ... + 14246834.

It is an arithmetic number, because the mean of its divisors is an integer number (5377905792).

Almost surely, 2^204211021424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204211021424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215116231680).

204211021424 is an abundant number, since it is smaller than the sum of its proper divisors (226021441936).

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

204211021424 is a wasteful number, since it uses less digits than its factorization.

204211021424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15910 (or 15904 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 204211021424 its reverse (424120112402), we get a palindrome (628331133826).

The spelling of 204211021424 in words is "two hundred four billion, two hundred eleven million, twenty-one thousand, four hundred twenty-four".