20302430121 has 12 divisors (see below), whose sum is σ = 29430098100. Its totient is φ = 13486784640.

The previous prime is 20302430111. The next prime is 20302430123. The reversal of 20302430121 is 12103420302.

It can be written as a sum of positive squares in 2 ways, for example, as 15323716521 + 4978713600 = 123789^2 + 70560^2 .

It is not a de Polignac number, because 20302430121 - 2⁵ = 20302430089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20302430094 and 20302430103.

It is not an unprimeable number, because it can be changed into a prime (20302430123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4011396 + ... + 4016453.

It is an arithmetic number, because the mean of its divisors is an integer number (2452508175).

Almost surely, 2^20302430121 is an apocalyptic number.

It is an amenable number.

20302430121 is a deficient number, since it is larger than the sum of its proper divisors (9127667979).

20302430121 is a wasteful number, since it uses less digits than its factorization.

20302430121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028136 (or 8028133 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20302430121 its reverse (12103420302), we get a palindrome (32405850423).

The spelling of 20302430121 in words is "twenty billion, three hundred two million, four hundred thirty thousand, one hundred twenty-one".