20481144337 has 2 divisors, whose sum is σ = 20481144338. Its totient is φ = 20481144336.

The previous prime is 20481144329. The next prime is 20481144421. The reversal of 20481144337 is 73344118402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16547220496 + 3933923841 = 128636^2 + 62721^2 .

It is a cyclic number.

It is not a de Polignac number, because 20481144337 - 2³ = 20481144329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20481144296 and 20481144305.

It is not a weakly prime, because it can be changed into another prime (20481144037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10240572168 + 10240572169.

It is an arithmetic number, because the mean of its divisors is an integer number (10240572169).

Almost surely, 2^20481144337 is an apocalyptic number.

It is an amenable number.

20481144337 is a deficient number, since it is larger than the sum of its proper divisors (1).

20481144337 is an equidigital number, since it uses as much as digits as its factorization.

20481144337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

The spelling of 20481144337 in words is "twenty billion, four hundred eighty-one million, one hundred forty-four thousand, three hundred thirty-seven".