20131021412 has 12 divisors (see below), whose sum is σ = 35231200956. Its totient is φ = 10064964000.

The previous prime is 20131021387. The next prime is 20131021433. The reversal of 20131021412 is 21412013102.

It can be written as a sum of positive squares in 2 ways, for example, as 12218207296 + 7912814116 = 110536^2 + 88954^2 .

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 3 ways as a sum of consecutive naturals, for example, 47339 + ... + 206162.

It is an arithmetic number, because the mean of its divisors is an integer number (2935933413).

Almost surely, 2^20131021412 is an apocalyptic number.

It is an amenable number.

20131021412 is a deficient number, since it is larger than the sum of its proper divisors (15100179544).

20131021412 is a wasteful number, since it uses less digits than its factorization.

20131021412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273358 (or 273356 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20131021412 its reverse (21412013102), we get a palindrome (41543034514).

The spelling of 20131021412 in words is "twenty billion, one hundred thirty-one million, twenty-one thousand, four hundred twelve".