30842861381 has 2 divisors, whose sum is σ = 30842861382. Its totient is φ = 30842861380.

The previous prime is 30842861377. The next prime is 30842861383. The reversal of 30842861381 is 18316824803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23534321281 + 7308540100 = 153409^2 + 85490^2 .

It is a cyclic number.

It is not a de Polignac number, because 30842861381 - 2² = 30842861377 is a prime.

It is a super-2 number, since 2×30842861381² (a number of 22 digits) contains 22 as substring.

Together with 30842861383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30842861383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15421430690 + 15421430691.

It is an arithmetic number, because the mean of its divisors is an integer number (15421430691).

Almost surely, 2^30842861381 is an apocalyptic number.

It is an amenable number.

30842861381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30842861381 is an equidigital number, since it uses as much as digits as its factorization.

30842861381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 30842861381 in words is "thirty billion, eight hundred forty-two million, eight hundred sixty-one thousand, three hundred eighty-one".