30434020421520 has 40 divisors (see below), whose sum is σ = 94345463307456. Its totient is φ = 8115738779008.

The previous prime is 30434020421503. The next prime is 30434020421527. The reversal of 30434020421520 is 2512402043403.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×30434020421520² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (30434020421527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63404208972 + ... + 63404209451.

Almost surely, 2^{30434020421520} is an apocalyptic number.

30434020421520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30434020421520 is an abundant number, since it is smaller than the sum of its proper divisors (63911442885936).

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

30434020421520 is a wasteful number, since it uses less digits than its factorization.

30434020421520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126808418439 (or 126808418433 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 30434020421520 its reverse (2512402043403), we get a palindrome (32946422464923).

The spelling of 30434020421520 in words is "thirty trillion, four hundred thirty-four billion, twenty million, four hundred twenty-one thousand, five hundred twenty".