30538180381 has 2 divisors, whose sum is σ = 30538180382. Its totient is φ = 30538180380.

The previous prime is 30538180373. The next prime is 30538180423. The reversal of 30538180381 is 18308183503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29280343225 + 1257837156 = 171115^2 + 35466^2 .

It is a cyclic number.

It is not a de Polignac number, because 30538180381 - 2³ = 30538180373 is a prime.

It is a super-2 number, since 2×30538180381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30538180181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15269090190 + 15269090191.

It is an arithmetic number, because the mean of its divisors is an integer number (15269090191).

Almost surely, 2^30538180381 is an apocalyptic number.

It is an amenable number.

30538180381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30538180381 is an equidigital number, since it uses as much as digits as its factorization.

30538180381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 30538180381 in words is "thirty billion, five hundred thirty-eight million, one hundred eighty thousand, three hundred eighty-one".