20120521230 has 64 divisors (see below), whose sum is σ = 54129625920. Its totient is φ = 5317982208.

The previous prime is 20120521177. The next prime is 20120521247. The reversal of 20120521230 is 3212502102.

20120521230 is a `hidden beast` number, since 2 + 0 + 120 + 521 + 23 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 299227 + ... + 360246.

It is an arithmetic number, because the mean of its divisors is an integer number (845775405).

Almost surely, 2^20120521230 is an apocalyptic number.

20120521230 is an abundant number, since it is smaller than the sum of its proper divisors (34009104690).

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

20120521230 is a wasteful number, since it uses less digits than its factorization.

20120521230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659602 (or 659596 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The spelling of 20120521230 in words is "twenty billion, one hundred twenty million, five hundred twenty-one thousand, two hundred thirty".