7421353420 has 96 divisors (see below), whose sum is σ = 17941150080. Its totient is φ = 2557040640.

The previous prime is 7421353339. The next prime is 7421353421. The reversal of 7421353420 is 243531247.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (7421353421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230046 + ... + 260314.

It is an arithmetic number, because the mean of its divisors is an integer number (186886980).

Almost surely, 2^7421353420 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 7421353420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8970575040).

7421353420 is an abundant number, since it is smaller than the sum of its proper divisors (10519796660).

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

7421353420 is a wasteful number, since it uses less digits than its factorization.

7421353420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30355 (or 30353 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 7421353420 is about 86147.2774961577. The cubic root of 7421353420 is about 1950.5677435170.

Adding to 7421353420 its reverse (243531247), we get a palindrome (7664884667).

The spelling of 7421353420 in words is "seven billion, four hundred twenty-one million, three hundred fifty-three thousand, four hundred twenty".