30746802181 has 4 divisors (see below), whose sum is σ = 30971231532. Its totient is φ = 30522372832.

The previous prime is 30746802169. The next prime is 30746802187. The reversal of 30746802181 is 18120864703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18120864703 = 281 ⋅64487063.

It can be written as a sum of positive squares in 2 ways, for example, as 18227430081 + 12519372100 = 135009^2 + 111890^2 .

It is a cyclic number.

It is not a de Polignac number, because 30746802181 - 2¹⁵ = 30746769413 is a prime.

It is a super-2 number, since 2×30746802181² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30746802187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112214470 + ... + 112214743.

It is an arithmetic number, because the mean of its divisors is an integer number (7742807883).

Almost surely, 2^30746802181 is an apocalyptic number.

It is an amenable number.

30746802181 is a deficient number, since it is larger than the sum of its proper divisors (224429351).

30746802181 is a wasteful number, since it uses less digits than its factorization.

30746802181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224429350.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 30746802181 in words is "thirty billion, seven hundred forty-six million, eight hundred two thousand, one hundred eighty-one".