38888800021 has 2 divisors, whose sum is σ = 38888800022. Its totient is φ = 38888800020.

The previous prime is 38888799959. The next prime is 38888800037. The reversal of 38888800021 is 12000888883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28945918225 + 9942881796 = 170135^2 + 99714^2 .

It is a cyclic number.

It is not a de Polignac number, because 38888800021 - 2¹³ = 38888791829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38889800021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19444400010 + 19444400011.

It is an arithmetic number, because the mean of its divisors is an integer number (19444400011).

Almost surely, 2^38888800021 is an apocalyptic number.

It is an amenable number.

38888800021 is a deficient number, since it is larger than the sum of its proper divisors (1).

38888800021 is an equidigital number, since it uses as much as digits as its factorization.

38888800021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196608, while the sum is 46.

The spelling of 38888800021 in words is "thirty-eight billion, eight hundred eighty-eight million, eight hundred thousand, twenty-one".