38355021 has 12 divisors (see below), whose sum is σ = 56229472. Its totient is φ = 25187976.

The previous prime is 38355013. The next prime is 38355067. The reversal of 38355021 is 12055383.

It is not a de Polignac number, because 38355021 - 2³ = 38355013 is a prime.

It is a super-2 number, since 2×38355021² = 2942215271820882, 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 (38355001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31201 + ... + 32406.

Almost surely, 2^38355021 is an apocalyptic number.

It is an amenable number.

38355021 is a deficient number, since it is larger than the sum of its proper divisors (17874451).

38355021 is a wasteful number, since it uses less digits than its factorization.

38355021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63680 (or 63677 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 38355021 is about 6193.1430630981. The cubic root of 38355021 is about 337.2412898025.

The spelling of 38355021 in words is "thirty-eight million, three hundred fifty-five thousand, twenty-one".