20131333333 has 2 divisors, whose sum is σ = 20131333334. Its totient is φ = 20131333332.

The previous prime is 20131333307. The next prime is 20131333337. The reversal of 20131333333 is 33333313102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18437023089 + 1694310244 = 135783^2 + 41162^2 .

It is a cyclic number.

It is not a de Polignac number, because 20131333333 - 2²¹ = 20129236181 is a prime.

20131333333 is a modest number, since divided by 333333 gives 20131 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20131333298 and 20131333307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20131333337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065666666 + 10065666667.

It is an arithmetic number, because the mean of its divisors is an integer number (10065666667).

Almost surely, 2^20131333333 is an apocalyptic number.

It is an amenable number.

20131333333 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131333333 is an equidigital number, since it uses as much as digits as its factorization.

20131333333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 25.

Adding to 20131333333 its reverse (33333313102), we get a palindrome (53464646435).

The spelling of 20131333333 in words is "twenty billion, one hundred thirty-one million, three hundred thirty-three thousand, three hundred thirty-three".