38020181 has 8 divisors (see below), whose sum is σ = 38643000. Its totient is φ = 37402560.

The previous prime is 38020163. The next prime is 38020193. The reversal of 38020181 is 18102083.

It can be written as a sum of positive squares in 4 ways, for example, as 4553956 + 33466225 = 2134^2 + 5785^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38020181 - 2²² = 33825877 is a prime.

It is a super-2 number, since 2×38020181² = 2891068326545522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38020111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15071 + ... + 17411.

It is an arithmetic number, because the mean of its divisors is an integer number (4830375).

Almost surely, 2^38020181 is an apocalyptic number.

It is an amenable number.

38020181 is a deficient number, since it is larger than the sum of its proper divisors (622819).

38020181 is a wasteful number, since it uses less digits than its factorization.

38020181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2599.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 38020181 is about 6166.0506809464. The cubic root of 38020181 is about 336.2570459591.

The spelling of 38020181 in words is "thirty-eight million, twenty thousand, one hundred eighty-one".