30506780018 has 64 divisors (see below), whose sum is σ = 56277172224. Its totient is φ = 12212424000.

The previous prime is 30506779937. The next prime is 30506780021. The reversal of 30506780018 is 81008760503.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 605255 + ... + 653717.

It is an arithmetic number, because the mean of its divisors is an integer number (879330816).

Almost surely, 2^30506780018 is an apocalyptic number.

30506780018 is a deficient number, since it is larger than the sum of its proper divisors (25770392206).

30506780018 is a wasteful number, since it uses less digits than its factorization.

30506780018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48591.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 30506780018 in words is "thirty billion, five hundred six million, seven hundred eighty thousand, eighteen".