30442155393 has 24 divisors (see below), whose sum is σ = 43997064960. Its totient is φ = 18714421440.

The previous prime is 30442155389. The next prime is 30442155427. The reversal of 30442155393 is 39355124403.

It is not a de Polignac number, because 30442155393 - 2² = 30442155389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (30442155593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 472143 + ... + 532731.

It is an arithmetic number, because the mean of its divisors is an integer number (1833211040).

Almost surely, 2^30442155393 is an apocalyptic number.

It is an amenable number.

30442155393 is a deficient number, since it is larger than the sum of its proper divisors (13554909567).

30442155393 is a wasteful number, since it uses less digits than its factorization.

30442155393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61609 (or 61596 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

Adding to 30442155393 its reverse (39355124403), we get a palindrome (69797279796).

The spelling of 30442155393 in words is "thirty billion, four hundred forty-two million, one hundred fifty-five thousand, three hundred ninety-three".