20131851252 has 24 divisors (see below), whose sum is σ = 46986682176. Its totient is φ = 6708851008.

The previous prime is 20131851251. The next prime is 20131851317. The reversal of 20131851252 is 25215813102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131851251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172848 + ... + 264839.

It is an arithmetic number, because the mean of its divisors is an integer number (1957778424).

Almost surely, 2^20131851252 is an apocalyptic number.

It is an amenable number.

20131851252 is an abundant number, since it is smaller than the sum of its proper divisors (26854830924).

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

20131851252 is a wasteful number, since it uses less digits than its factorization.

20131851252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441527 (or 441525 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The spelling of 20131851252 in words is "twenty billion, one hundred thirty-one million, eight hundred fifty-one thousand, two hundred fifty-two".