20530431125 has 32 divisors (see below), whose sum is σ = 26436533760. Its totient is φ = 15910065600.

The previous prime is 20530431109. The next prime is 20530431169. The reversal of 20530431125 is 52113403502.

It is a happy number.

It is not a de Polignac number, because 20530431125 - 2⁴ = 20530431109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20530431094 and 20530431103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 503762 + ... + 542988.

It is an arithmetic number, because the mean of its divisors is an integer number (826141680).

Almost surely, 2^20530431125 is an apocalyptic number.

20530431125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20530431125 is a deficient number, since it is larger than the sum of its proper divisors (5906102635).

20530431125 is an equidigital number, since it uses as much as digits as its factorization.

20530431125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39374 (or 39364 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20530431125 its reverse (52113403502), we get a palindrome (72643834627).

The spelling of 20530431125 in words is "twenty billion, five hundred thirty million, four hundred thirty-one thousand, one hundred twenty-five".