30420020051 has 2 divisors, whose sum is σ = 30420020052. Its totient is φ = 30420020050.

The previous prime is 30420020027. The next prime is 30420020063. The reversal of 30420020051 is 15002002403.

It is a strong prime.

It is an emirp because it is prime and its reverse (15002002403) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30420020051 is a prime.

It is not a weakly prime, because it can be changed into another prime (30420020651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15210010025 + 15210010026.

It is an arithmetic number, because the mean of its divisors is an integer number (15210010026).

Almost surely, 2^30420020051 is an apocalyptic number.

30420020051 is a deficient number, since it is larger than the sum of its proper divisors (1).

30420020051 is an equidigital number, since it uses as much as digits as its factorization.

30420020051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 17.

Adding to 30420020051 its reverse (15002002403), we get a palindrome (45422022454).

The spelling of 30420020051 in words is "thirty billion, four hundred twenty million, twenty thousand, fifty-one".