20130306725 has 12 divisors (see below), whose sum is σ = 24963658176. Its totient is φ = 16102904880.

The previous prime is 20130306719. The next prime is 20130306743. The reversal of 20130306725 is 52760303102.

It is not a de Polignac number, because 20130306725 - 2⁴ = 20130306709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 366404 + ... + 417746.

It is an arithmetic number, because the mean of its divisors is an integer number (2080304848).

Almost surely, 2^20130306725 is an apocalyptic number.

20130306725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20130306725 is a deficient number, since it is larger than the sum of its proper divisors (4833351451).

20130306725 is a wasteful number, since it uses less digits than its factorization.

20130306725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67036 (or 67031 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 29.

Adding to 20130306725 its reverse (52760303102), we get a palindrome (72890609827).

The spelling of 20130306725 in words is "twenty billion, one hundred thirty million, three hundred six thousand, seven hundred twenty-five".