20130520244 has 12 divisors (see below), whose sum is σ = 35245942368. Its totient is φ = 10060251000.

The previous prime is 20130520243. The next prime is 20130520247. The reversal of 20130520244 is 44202503102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130520243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243232 + ... + 1259319.

It is an arithmetic number, because the mean of its divisors is an integer number (2937161864).

Almost surely, 2^20130520244 is an apocalyptic number.

It is an amenable number.

20130520244 is a deficient number, since it is larger than the sum of its proper divisors (15115422124).

20130520244 is a wasteful number, since it uses less digits than its factorization.

20130520244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504566 (or 2504564 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The spelling of 20130520244 in words is "twenty billion, one hundred thirty million, five hundred twenty thousand, two hundred forty-four".