38893424221 has 2 divisors, whose sum is σ = 38893424222. Its totient is φ = 38893424220.

The previous prime is 38893424183. The next prime is 38893424239. The reversal of 38893424221 is 12242439883.

38893424221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38883501721 + 9922500 = 197189^2 + 3150^2 .

It is a cyclic number.

It is not a de Polignac number, because 38893424221 - 2¹⁷ = 38893293149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38893424261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19446712110 + 19446712111.

It is an arithmetic number, because the mean of its divisors is an integer number (19446712111).

Almost surely, 2^38893424221 is an apocalyptic number.

It is an amenable number.

38893424221 is a deficient number, since it is larger than the sum of its proper divisors (1).

38893424221 is an equidigital number, since it uses as much as digits as its factorization.

38893424221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 46.

The spelling of 38893424221 in words is "thirty-eight billion, eight hundred ninety-three million, four hundred twenty-four thousand, two hundred twenty-one".