30034270781 has 4 divisors (see below), whose sum is σ = 30191518464. Its totient is φ = 29877023100.

The previous prime is 30034270727. The next prime is 30034270789. The reversal of 30034270781 is 18707243003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30034270781 - 2³⁴ = 12854401597 is a prime.

It is a super-2 number, since 2×30034270781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30034270789) 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, 78623555 + ... + 78623936.

It is an arithmetic number, because the mean of its divisors is an integer number (7547879616).

Almost surely, 2^30034270781 is an apocalyptic number.

It is an amenable number.

30034270781 is a deficient number, since it is larger than the sum of its proper divisors (157247683).

30034270781 is a wasteful number, since it uses less digits than its factorization.

30034270781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157247682.

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 30034270781 in words is "thirty billion, thirty-four million, two hundred seventy thousand, seven hundred eighty-one".