38021913 has 8 divisors (see below), whose sum is σ = 56328800. Its totient is φ = 25347924.

The previous prime is 38021887. The next prime is 38021939. The reversal of 38021913 is 31912083.

It is an interprime number because it is at equal distance from previous prime (38021887) and next prime (38021939).

It is not a de Polignac number, because 38021913 - 2⁸ = 38021657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1408219 = 38021913 / (3 + 8 + 0 + 2 + 1 + 9 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38021953) 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, 704083 + ... + 704136.

It is an arithmetic number, because the mean of its divisors is an integer number (7041100).

Almost surely, 2^38021913 is an apocalyptic number.

It is an amenable number.

38021913 is a deficient number, since it is larger than the sum of its proper divisors (18306887).

38021913 is a wasteful number, since it uses less digits than its factorization.

38021913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408228 (or 1408222 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 38021913 is about 6166.1911258085. The cubic root of 38021913 is about 336.2621519173.

Adding to 38021913 its reverse (31912083), we get a palindrome (69933996).

The spelling of 38021913 in words is "thirty-eight million, twenty-one thousand, nine hundred thirteen".