30504491993 has 2 divisors, whose sum is σ = 30504491994. Its totient is φ = 30504491992.

The previous prime is 30504491987. The next prime is 30504492019. The reversal of 30504491993 is 39919440503.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30461419024 + 43072969 = 174532^2 + 6563^2 .

It is a cyclic number.

It is not a de Polignac number, because 30504491993 - 2¹⁰ = 30504490969 is a prime.

It is a super-2 number, since 2×30504491993² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30504496993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15252245996 + 15252245997.

It is an arithmetic number, because the mean of its divisors is an integer number (15252245997).

Almost surely, 2^30504491993 is an apocalyptic number.

It is an amenable number.

30504491993 is a deficient number, since it is larger than the sum of its proper divisors (1).

30504491993 is an equidigital number, since it uses as much as digits as its factorization.

30504491993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 30504491993 in words is "thirty billion, five hundred four million, four hundred ninety-one thousand, nine hundred ninety-three".