20011444429 has 2 divisors, whose sum is σ = 20011444430. Its totient is φ = 20011444428.

The previous prime is 20011444363. The next prime is 20011444463. The reversal of 20011444429 is 92444411002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16301416329 + 3710028100 = 127677^2 + 60910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011444429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20011444429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011447429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005722214 + 10005722215.

It is an arithmetic number, because the mean of its divisors is an integer number (10005722215).

Almost surely, 2^20011444429 is an apocalyptic number.

It is an amenable number.

20011444429 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011444429 is an equidigital number, since it uses as much as digits as its factorization.

20011444429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 20011444429 in words is "twenty billion, eleven million, four hundred forty-four thousand, four hundred twenty-nine".