20244315551 has 2 divisors, whose sum is σ = 20244315552. Its totient is φ = 20244315550.

The previous prime is 20244315503. The next prime is 20244315569. The reversal of 20244315551 is 15551344202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20244315551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20244314551) 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 as a sum of consecutive naturals, namely, 10122157775 + 10122157776.

It is an arithmetic number, because the mean of its divisors is an integer number (10122157776).

Almost surely, 2^20244315551 is an apocalyptic number.

20244315551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20244315551 is an equidigital number, since it uses as much as digits as its factorization.

20244315551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 20244315551 its reverse (15551344202), we get a palindrome (35795659753).

The spelling of 20244315551 in words is "twenty billion, two hundred forty-four million, three hundred fifteen thousand, five hundred fifty-one".