38500021 has 4 divisors (see below), whose sum is σ = 44000032. Its totient is φ = 33000012.

The previous prime is 38500001. The next prime is 38500039. The reversal of 38500021 is 12000583.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12000583 = 7 ⋅1714369.

It is a cyclic number.

It is not a de Polignac number, because 38500021 - 2⁷ = 38499893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38500001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2749995 + ... + 2750008.

It is an arithmetic number, because the mean of its divisors is an integer number (11000008).

Almost surely, 2^38500021 is an apocalyptic number.

It is an amenable number.

38500021 is a deficient number, since it is larger than the sum of its proper divisors (5500011).

38500021 is an equidigital number, since it uses as much as digits as its factorization.

38500021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5500010.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 38500021 is about 6204.8385152234. The cubic root of 38500021 is about 337.6657322284.

The spelling of 38500021 in words is "thirty-eight million, five hundred thousand, twenty-one".