30040433391 has 4 divisors (see below), whose sum is σ = 40053911192. Its totient is φ = 20026955592.

The previous prime is 30040433323. The next prime is 30040433407. The reversal of 30040433391 is 19333404003.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 30040433391 - 2²² = 30036239087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30040833391) 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, 5006738896 + ... + 5006738901.

It is an arithmetic number, because the mean of its divisors is an integer number (10013477798).

Almost surely, 2^30040433391 is an apocalyptic number.

30040433391 is a deficient number, since it is larger than the sum of its proper divisors (10013477801).

30040433391 is a wasteful number, since it uses less digits than its factorization.

30040433391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10013477800.

The product of its (nonzero) digits is 11664, while the sum is 30.

Adding to 30040433391 its reverse (19333404003), we get a palindrome (49373837394).

The spelling of 30040433391 in words is "thirty billion, forty million, four hundred thirty-three thousand, three hundred ninety-one".