30020293905 has 32 divisors (see below), whose sum is σ = 54978441984. Its totient is φ = 13702515456.

The previous prime is 30020293871. The next prime is 30020293907. The reversal of 30020293905 is 50939202003.

It is not a de Polignac number, because 30020293905 - 2⁷ = 30020293777 is a prime.

It is a super-2 number, since 2×30020293905² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30020293907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150354 + ... + 287483.

It is an arithmetic number, because the mean of its divisors is an integer number (1718076312).

Almost surely, 2^30020293905 is an apocalyptic number.

30020293905 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30020293905 is a deficient number, since it is larger than the sum of its proper divisors (24958148079).

30020293905 is a wasteful number, since it uses less digits than its factorization.

30020293905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438505.

The product of its (nonzero) digits is 14580, while the sum is 33.

Adding to 30020293905 its reverse (50939202003), we get a palindrome (80959495908).

The spelling of 30020293905 in words is "thirty billion, twenty million, two hundred ninety-three thousand, nine hundred five".