20015431230 has 32 divisors (see below), whose sum is σ = 48462149664. Its totient is φ = 5290213376.

The previous prime is 20015431217. The next prime is 20015431259. The reversal of 20015431230 is 3213451002.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20015431197 and 20015431206.

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 15 ways as a sum of consecutive naturals, for example, 2948739 + ... + 2955518.

It is an arithmetic number, because the mean of its divisors is an integer number (1514442177).

Almost surely, 2^20015431230 is an apocalyptic number.

20015431230 is an abundant number, since it is smaller than the sum of its proper divisors (28446718434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20015431230 is a wasteful number, since it uses less digits than its factorization.

20015431230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5904380.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20015431230 its reverse (3213451002), we get a palindrome (23228882232).

The spelling of 20015431230 in words is "twenty billion, fifteen million, four hundred thirty-one thousand, two hundred thirty".