20421104000 has 256 divisors, whose sum is σ = 57311841600. Its totient is φ = 7168000000.

The previous prime is 20421103957. The next prime is 20421104051. The reversal of 20421104000 is 40112402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5102000 + ... + 5106000.

Almost surely, 2^20421104000 is an apocalyptic number.

20421104000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20421104000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28655920800).

20421104000 is an abundant number, since it is smaller than the sum of its proper divisors (36890737600).

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

20421104000 is a wasteful number, since it uses less digits than its factorization.

20421104000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070 (or 4048 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20421104000 its reverse (40112402), we get a palindrome (20461216402).

It can be divided in two parts, 20421 and 104000, that added together give a palindrome (124421).

The spelling of 20421104000 in words is "twenty billion, four hundred twenty-one million, one hundred four thousand".