30021044420 has 12 divisors (see below), whose sum is σ = 63044193324. Its totient is φ = 12008417760.

The previous prime is 30021044371. The next prime is 30021044467. The reversal of 30021044420 is 2444012003.

It can be written as a sum of positive squares in 2 ways, for example, as 6418252996 + 23602791424 = 80114^2 + 153632^2 .

It is a super-2 number, since 2×30021044420² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1501052221 = 30021044420 / (3 + 0 + 0 + 2 + 1 + 0 + 4 + 4 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 30021044392 and 30021044401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750526091 + ... + 750526130.

It is an arithmetic number, because the mean of its divisors is an integer number (5253682777).

Almost surely, 2^30021044420 is an apocalyptic number.

It is an amenable number.

30021044420 is an abundant number, since it is smaller than the sum of its proper divisors (33023148904).

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

30021044420 is a wasteful number, since it uses less digits than its factorization.

30021044420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501052230 (or 1501052228 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 30021044420 its reverse (2444012003), we get a palindrome (32465056423).

The spelling of 30021044420 in words is "thirty billion, twenty-one million, forty-four thousand, four hundred twenty".