30212400042 has 96 divisors (see below), whose sum is σ = 77761944000. Its totient is φ = 8374302720.

The previous prime is 30212400011. The next prime is 30212400047. The reversal of 30212400042 is 24000421203.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30212399988 and 30212400024.

It is not an unprimeable number, because it can be changed into a prime (30212400047) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29367 + ... + 247562.

It is an arithmetic number, because the mean of its divisors is an integer number (810020250).

Almost surely, 2^30212400042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30212400042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38880972000).

30212400042 is an abundant number, since it is smaller than the sum of its proper divisors (47549543958).

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

30212400042 is a wasteful number, since it uses less digits than its factorization.

30212400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276996 (or 276993 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 30212400042 its reverse (24000421203), we get a palindrome (54212821245).

The spelling of 30212400042 in words is "thirty billion, two hundred twelve million, four hundred thousand, forty-two".