38387525810021 has 2 divisors, whose sum is σ = 38387525810022. Its totient is φ = 38387525810020.

The previous prime is 38387525810009. The next prime is 38387525810077. The reversal of 38387525810021 is 12001852578383.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34423026688996 + 3964499121025 = 5867114^2 + 1991105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38387525810021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38387525819021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19193762905010 + 19193762905011.

It is an arithmetic number, because the mean of its divisors is an integer number (19193762905011).

Almost surely, 2^{38387525810021} is an apocalyptic number.

It is an amenable number.

38387525810021 is a deficient number, since it is larger than the sum of its proper divisors (1).

38387525810021 is an equidigital number, since it uses as much as digits as its factorization.

38387525810021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3225600, while the sum is 53.

The spelling of 38387525810021 in words is "thirty-eight trillion, three hundred eighty-seven billion, five hundred twenty-five million, eight hundred ten thousand, twenty-one".