38733220181 has 2 divisors, whose sum is σ = 38733220182. Its totient is φ = 38733220180.

The previous prime is 38733220177. The next prime is 38733220199. The reversal of 38733220181 is 18102233783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28151806225 + 10581413956 = 167785^2 + 102866^2 .

It is a cyclic number.

It is not a de Polignac number, because 38733220181 - 2² = 38733220177 is a prime.

It is a super-2 number, since 2×38733220181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38733220111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19366610090 + 19366610091.

It is an arithmetic number, because the mean of its divisors is an integer number (19366610091).

Almost surely, 2^38733220181 is an apocalyptic number.

It is an amenable number.

38733220181 is a deficient number, since it is larger than the sum of its proper divisors (1).

38733220181 is an equidigital number, since it uses as much as digits as its factorization.

38733220181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 38733220181 in words is "thirty-eight billion, seven hundred thirty-three million, two hundred twenty thousand, one hundred eighty-one".