21434024304 has 200 divisors, whose sum is σ = 77344299648. Its totient is φ = 5567253120.

The previous prime is 21434024291. The next prime is 21434024329. The reversal of 21434024304 is 40342043412.

It is a happy number.

21434024304 is a `hidden beast` number, since 2 + 14 + 340 + 2 + 4 + 304 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7602 + ... + 207185.

Almost surely, 2^21434024304 is an apocalyptic number.

21434024304 is a gapful number since it is divisible by the number (24) 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 21434024304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38672149824).

21434024304 is an abundant number, since it is smaller than the sum of its proper divisors (55910275344).

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

21434024304 is a wasteful number, since it uses less digits than its factorization.

21434024304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214825 (or 214810 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21434024304 its reverse (40342043412), we get a palindrome (61776067716).

The spelling of 21434024304 in words is "twenty-one billion, four hundred thirty-four million, twenty-four thousand, three hundred four".