1938583020481 has 4 divisors (see below), whose sum is σ = 1938628206592. Its totient is φ = 1938537834372.

The previous prime is 1938583020467. The next prime is 1938583020497. The reversal of 1938583020481 is 1840203858391.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1938583020481 - 2⁵ = 1938583020449 is a prime.

It is a super-2 number, since 2×1938583020481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1938583027481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22528641 + ... + 22614526.

It is an arithmetic number, because the mean of its divisors is an integer number (484657051648).

Almost surely, 2^{1938583020481} is an apocalyptic number.

It is an amenable number.

1938583020481 is a deficient number, since it is larger than the sum of its proper divisors (45186111).

1938583020481 is an equidigital number, since it uses as much as digits as its factorization.

1938583020481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45186110.

The product of its (nonzero) digits is 1658880, while the sum is 52.

The spelling of 1938583020481 in words is "one trillion, nine hundred thirty-eight billion, five hundred eighty-three million, twenty thousand, four hundred eighty-one".