30020198081 has 2 divisors, whose sum is σ = 30020198082. Its totient is φ = 30020198080.

The previous prime is 30020198077. The next prime is 30020198101. The reversal of 30020198081 is 18089102003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29175714481 + 844483600 = 170809^2 + 29060^2 .

It is a cyclic number.

It is not a de Polignac number, because 30020198081 - 2² = 30020198077 is a prime.

It is a super-2 number, since 2×30020198081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30020198041) 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 as a sum of consecutive naturals, namely, 15010099040 + 15010099041.

It is an arithmetic number, because the mean of its divisors is an integer number (15010099041).

Almost surely, 2^30020198081 is an apocalyptic number.

It is an amenable number.

30020198081 is a deficient number, since it is larger than the sum of its proper divisors (1).

30020198081 is an equidigital number, since it uses as much as digits as its factorization.

30020198081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 30020198081 in words is "thirty billion, twenty million, one hundred ninety-eight thousand, eighty-one".