30730672518 has 192 divisors, whose sum is σ = 80078035968. Its totient is φ = 7786437120.

The previous prime is 30730672517. The next prime is 30730672519. The reversal of 30730672518 is 81527603703.

It is an interprime number because it is at equal distance from previous prime (30730672517) and next prime (30730672519).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 30730672518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30730672517) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10497571 + ... + 10500497.

It is an arithmetic number, because the mean of its divisors is an integer number (417073104).

Almost surely, 2^30730672518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30730672518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40039017984).

30730672518 is an abundant number, since it is smaller than the sum of its proper divisors (49347363450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30730672518 is a wasteful number, since it uses less digits than its factorization.

30730672518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067 (or 3060 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 30730672518 in words is "thirty billion, seven hundred thirty million, six hundred seventy-two thousand, five hundred eighteen".