73030018381 has 2 divisors, whose sum is σ = 73030018382. Its totient is φ = 73030018380.

The previous prime is 73030018309. The next prime is 73030018417. The reversal of 73030018381 is 18381003037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59726472100 + 13303546281 = 244390^2 + 115341^2 .

It is a cyclic number.

It is not a de Polignac number, because 73030018381 - 2¹³ = 73030010189 is a prime.

It is a super-2 number, since 2×73030018381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73030018081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36515009190 + 36515009191.

It is an arithmetic number, because the mean of its divisors is an integer number (36515009191).

Almost surely, 2^73030018381 is an apocalyptic number.

It is an amenable number.

73030018381 is a deficient number, since it is larger than the sum of its proper divisors (1).

73030018381 is an equidigital number, since it uses as much as digits as its factorization.

73030018381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 73030018381 in words is "seventy-three billion, thirty million, eighteen thousand, three hundred eighty-one".