20011430233 has 2 divisors, whose sum is σ = 20011430234. Its totient is φ = 20011430232.

The previous prime is 20011430189. The next prime is 20011430261. The reversal of 20011430233 is 33203411002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19452438784 + 558991449 = 139472^2 + 23643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011430233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011430233.

It is not a weakly prime, because it can be changed into another prime (20011430633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005715116 + 10005715117.

It is an arithmetic number, because the mean of its divisors is an integer number (10005715117).

Almost surely, 2^20011430233 is an apocalyptic number.

It is an amenable number.

20011430233 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011430233 is an equidigital number, since it uses as much as digits as its factorization.

20011430233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20011430233 its reverse (33203411002), we get a palindrome (53214841235).

The spelling of 20011430233 in words is "twenty billion, eleven million, four hundred thirty thousand, two hundred thirty-three".