1938101013 has 20 divisors (see below), whose sum is σ = 2896585120. Its totient is φ = 1291443912.

The previous prime is 1938100973. The next prime is 1938101021. The reversal of 1938101013 is 3101018391.

It is a happy number.

It is not a de Polignac number, because 1938101013 - 2⁶ = 1938100949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938101063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 214848 + ... + 223686.

It is an arithmetic number, because the mean of its divisors is an integer number (144829256).

Almost surely, 2^1938101013 is an apocalyptic number.

It is an amenable number.

1938101013 is a deficient number, since it is larger than the sum of its proper divisors (958484107).

1938101013 is an equidigital number, since it uses as much as digits as its factorization.

1938101013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11558 (or 11549 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1938101013 is about 44023.8686737093. The cubic root of 1938101013 is about 1246.7866292506.

The spelling of 1938101013 in words is "one billion, nine hundred thirty-eight million, one hundred one thousand, thirteen".