30420120423 has 32 divisors (see below), whose sum is σ = 51744540672. Its totient is φ = 15435151200.

The previous prime is 30420120421. The next prime is 30420120427. The reversal of 30420120423 is 32402102403.

It is not a de Polignac number, because 30420120423 - 2¹ = 30420120421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 30420120423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420120421) 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 31 ways as a sum of consecutive naturals, for example, 1521333 + ... + 1541198.

It is an arithmetic number, because the mean of its divisors is an integer number (1617016896).

Almost surely, 2^30420120423 is an apocalyptic number.

30420120423 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

30420120423 is a deficient number, since it is larger than the sum of its proper divisors (21324420249).

30420120423 is a wasteful number, since it uses less digits than its factorization.

30420120423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3062595.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 30420120423 its reverse (32402102403), we get a palindrome (62822222826).

The spelling of 30420120423 in words is "thirty billion, four hundred twenty million, one hundred twenty thousand, four hundred twenty-three".