38431444421 has 2 divisors, whose sum is σ = 38431444422. Its totient is φ = 38431444420.

The previous prime is 38431444361. The next prime is 38431444463. The reversal of 38431444421 is 12444413483.

38431444421 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., 35349640225 + 3081804196 = 188015^2 + 55514^2 .

It is a cyclic number.

It is not a de Polignac number, because 38431444421 - 2¹⁴ = 38431428037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38431444481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19215722210 + 19215722211.

It is an arithmetic number, because the mean of its divisors is an integer number (19215722211).

Almost surely, 2^38431444421 is an apocalyptic number.

It is an amenable number.

38431444421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38431444421 is an equidigital number, since it uses as much as digits as its factorization.

38431444421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147456, while the sum is 38.

The spelling of 38431444421 in words is "thirty-eight billion, four hundred thirty-one million, four hundred forty-four thousand, four hundred twenty-one".