7421321024838 has 48 divisors (see below), whose sum is σ = 18377421173280. Its totient is φ = 2120283197568.

The previous prime is 7421321024837. The next prime is 7421321024861. The reversal of 7421321024838 is 8384201231247.

7421321024838 is a `hidden beast` number, since 7 + 421 + 3 + 210 + 2 + 4 + 8 + 3 + 8 = 666.

It is a super-2 number, since 2×7421321024838² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7421321024793 and 7421321024802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421321024837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1562308 + ... + 4157336.

It is an arithmetic number, because the mean of its divisors is an integer number (382862941110).

Almost surely, 2^{7421321024838} is an apocalyptic number.

7421321024838 is an abundant number, since it is smaller than the sum of its proper divisors (10956100148442).

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

7421321024838 is a wasteful number, since it uses less digits than its factorization.

7421321024838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617741 (or 2617738 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 7421321024838 in words is "seven trillion, four hundred twenty-one billion, three hundred twenty-one million, twenty-four thousand, eight hundred thirty-eight".