30421433440 has 48 divisors (see below), whose sum is σ = 72235536912. Its totient is φ = 12106791424.

The previous prime is 30421433401. The next prime is 30421433491. The reversal of 30421433440 is 4433412403.

It is a super-2 number, since 2×30421433440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30421433399 and 30421433408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451054 + ... + 514093.

It is an arithmetic number, because the mean of its divisors is an integer number (1504907019).

Almost surely, 2^30421433440 is an apocalyptic number.

It is an amenable number.

30421433440 is an abundant number, since it is smaller than the sum of its proper divisors (41814103472).

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

30421433440 is a wasteful number, since it uses less digits than its factorization.

30421433440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965359 (or 965351 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 30421433440 its reverse (4433412403), we get a palindrome (34854845843).

The spelling of 30421433440 in words is "thirty billion, four hundred twenty-one million, four hundred thirty-three thousand, four hundred forty".