7418013821 has 2 divisors, whose sum is σ = 7418013822. Its totient is φ = 7418013820.

The previous prime is 7418013817. The next prime is 7418013853. The reversal of 7418013821 is 1283108147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6976425625 + 441588196 = 83525^2 + 21014^2 .

It is an emirp because it is prime and its reverse (1283108147) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7418013821 - 2² = 7418013817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7418013871) 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 as a sum of consecutive naturals, namely, 3709006910 + 3709006911.

It is an arithmetic number, because the mean of its divisors is an integer number (3709006911).

Almost surely, 2^7418013821 is an apocalyptic number.

It is an amenable number.

7418013821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7418013821 is an equidigital number, since it uses as much as digits as its factorization.

7418013821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 7418013821 is about 86127.8922359069. The cubic root of 7418013821 is about 1950.2751153366.

The spelling of 7418013821 in words is "seven billion, four hundred eighteen million, thirteen thousand, eight hundred twenty-one".