38529470821 has 2 divisors, whose sum is σ = 38529470822. Its totient is φ = 38529470820.

The previous prime is 38529470669. The next prime is 38529470851. The reversal of 38529470821 is 12807492583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31511220196 + 7018250625 = 177514^2 + 83775^2 .

It is a cyclic number.

It is not a de Polignac number, because 38529470821 - 2¹¹ = 38529468773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38529470851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19264735410 + 19264735411.

It is an arithmetic number, because the mean of its divisors is an integer number (19264735411).

Almost surely, 2^38529470821 is an apocalyptic number.

It is an amenable number.

38529470821 is a deficient number, since it is larger than the sum of its proper divisors (1).

38529470821 is an equidigital number, since it uses as much as digits as its factorization.

38529470821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 38529470821 in words is "thirty-eight billion, five hundred twenty-nine million, four hundred seventy thousand, eight hundred twenty-one".