38203328021 has 2 divisors, whose sum is σ = 38203328022. Its totient is φ = 38203328020.

The previous prime is 38203328017. The next prime is 38203328029. The reversal of 38203328021 is 12082330283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23218140625 + 14985187396 = 152375^2 + 122414^2 .

It is a cyclic number.

It is not a de Polignac number, because 38203328021 - 2² = 38203328017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38203328029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19101664010 + 19101664011.

It is an arithmetic number, because the mean of its divisors is an integer number (19101664011).

Almost surely, 2^38203328021 is an apocalyptic number.

It is an amenable number.

38203328021 is a deficient number, since it is larger than the sum of its proper divisors (1).

38203328021 is an equidigital number, since it uses as much as digits as its factorization.

38203328021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 38203328021 in words is "thirty-eight billion, two hundred three million, three hundred twenty-eight thousand, twenty-one".