7421336420 has 72 divisors (see below), whose sum is σ = 16147360824. Its totient is φ = 2862991872.

The previous prime is 7421336411. The next prime is 7421336441. The reversal of 7421336420 is 246331247.

It can be written as a sum of positive squares in 4 ways, for example, as 283114276 + 7138222144 = 16826^2 + 84488^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23710184 + ... + 23710496.

Almost surely, 2^7421336420 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 7421336420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8073680412).

7421336420 is an abundant number, since it is smaller than the sum of its proper divisors (8726024404).

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

7421336420 is a wasteful number, since it uses less digits than its factorization.

7421336420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 7421336420 is about 86147.1788278641. The cubic root of 7421336420 is about 1950.5662541357.

Adding to 7421336420 its reverse (246331247), we get a palindrome (7667667667).

The spelling of 7421336420 in words is "seven billion, four hundred twenty-one million, three hundred thirty-six thousand, four hundred twenty".