38221820009 has 2 divisors, whose sum is σ = 38221820010. Its totient is φ = 38221820008.

The previous prime is 38221819943. The next prime is 38221820071. The reversal of 38221820009 is 90002812283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38220250000 + 1570009 = 195500^2 + 1253^2 .

It is a cyclic number.

It is not a de Polignac number, because 38221820009 - 2¹² = 38221815913 is a prime.

It is a super-3 number, since 3×38221820009³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (38221820309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19110910004 + 19110910005.

It is an arithmetic number, because the mean of its divisors is an integer number (19110910005).

Almost surely, 2^38221820009 is an apocalyptic number.

It is an amenable number.

38221820009 is a deficient number, since it is larger than the sum of its proper divisors (1).

38221820009 is an equidigital number, since it uses as much as digits as its factorization.

38221820009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 38221820009 in words is "thirty-eight billion, two hundred twenty-one million, eight hundred twenty thousand, nine".