20383638281 has 2 divisors, whose sum is σ = 20383638282. Its totient is φ = 20383638280.

The previous prime is 20383638271. The next prime is 20383638313. The reversal of 20383638281 is 18283638302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12303246400 + 8080391881 = 110920^2 + 89891^2 .

It is a cyclic number.

It is not a de Polignac number, because 20383638281 - 2¹⁴ = 20383621897 is a prime.

It is a super-2 number, since 2×20383638281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20383638251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10191819140 + 10191819141.

It is an arithmetic number, because the mean of its divisors is an integer number (10191819141).

Almost surely, 2^20383638281 is an apocalyptic number.

It is an amenable number.

20383638281 is a deficient number, since it is larger than the sum of its proper divisors (1).

20383638281 is an equidigital number, since it uses as much as digits as its factorization.

20383638281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 20383638281 in words is "twenty billion, three hundred eighty-three million, six hundred thirty-eight thousand, two hundred eighty-one".