20038489481 has 2 divisors, whose sum is σ = 20038489482. Its totient is φ = 20038489480.

The previous prime is 20038489411. The next prime is 20038489483. The reversal of 20038489481 is 18498483002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17109948025 + 2928541456 = 130805^2 + 54116^2 .

It is a cyclic number.

It is not a de Polignac number, because 20038489481 - 2¹⁴ = 20038473097 is a prime.

It is a super-2 number, since 2×20038489481² (a number of 21 digits) contains 22 as substring.

Together with 20038489483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20038489483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10019244740 + 10019244741.

It is an arithmetic number, because the mean of its divisors is an integer number (10019244741).

Almost surely, 2^20038489481 is an apocalyptic number.

It is an amenable number.

20038489481 is a deficient number, since it is larger than the sum of its proper divisors (1).

20038489481 is an equidigital number, since it uses as much as digits as its factorization.

20038489481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 20038489481 in words is "twenty billion, thirty-eight million, four hundred eighty-nine thousand, four hundred eighty-one".