30020420521 has 16 divisors (see below), whose sum is σ = 36952320384. Its totient is φ = 23749778304.

The previous prime is 30020420483. The next prime is 30020420567. The reversal of 30020420521 is 12502402003.

It is not a de Polignac number, because 30020420521 - 2⁹ = 30020420009 is a prime.

It is a super-2 number, since 2×30020420521² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30020420321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1421586 + ... + 1442548.

It is an arithmetic number, because the mean of its divisors is an integer number (2309520024).

Almost surely, 2^30020420521 is an apocalyptic number.

It is an amenable number.

30020420521 is a deficient number, since it is larger than the sum of its proper divisors (6931899863).

30020420521 is a wasteful number, since it uses less digits than its factorization.

30020420521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36720.

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 30020420521 its reverse (12502402003), we get a palindrome (42522822524).

The spelling of 30020420521 in words is "thirty billion, twenty million, four hundred twenty thousand, five hundred twenty-one".