30420717858 has 20 divisors (see below), whose sum is σ = 68164942230. Its totient is φ = 10140239232.

The previous prime is 30420717841. The next prime is 30420717919. The reversal of 30420717858 is 85871702403.

30420717858 is a `hidden beast` number, since 3 + 0 + 420 + 7 + 178 + 58 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15432347529 + 14988370329 = 124227^2 + 122427^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 93890943 + ... + 93891266.

Almost surely, 2^30420717858 is an apocalyptic number.

30420717858 is an abundant number, since it is smaller than the sum of its proper divisors (37744224372).

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

30420717858 is a wasteful number, since it uses less digits than its factorization.

30420717858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187782223 (or 187782214 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 30420717858 in words is "thirty billion, four hundred twenty million, seven hundred seventeen thousand, eight hundred fifty-eight".