30420444124 has 48 divisors (see below), whose sum is σ = 62582768640. Its totient is φ = 12668068800.

The previous prime is 30420444097. The next prime is 30420444143. The reversal of 30420444124 is 42144402403.

It is a super-2 number, since 2×30420444124² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 30420444092 and 30420444101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99774 + ... + 266074.

It is an arithmetic number, because the mean of its divisors is an integer number (1303807680).

Almost surely, 2^30420444124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30420444124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31291384320).

30420444124 is an abundant number, since it is smaller than the sum of its proper divisors (32162324516).

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

30420444124 is a wasteful number, since it uses less digits than its factorization.

30420444124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166498 (or 166496 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 30420444124 its reverse (42144402403), we get a palindrome (72564846527).

The spelling of 30420444124 in words is "thirty billion, four hundred twenty million, four hundred forty-four thousand, one hundred twenty-four".