19938397075 has 12 divisors (see below), whose sum is σ = 24741661968. Its totient is φ = 15939072800.

The previous prime is 19938397051. The next prime is 19938397117. The reversal of 19938397075 is 57079383991.

It is not a de Polignac number, because 19938397075 - 2⁵ = 19938397043 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256111 + ... + 324760.

It is an arithmetic number, because the mean of its divisors is an integer number (2061805164).

Almost surely, 2^19938397075 is an apocalyptic number.

19938397075 is a deficient number, since it is larger than the sum of its proper divisors (4803264893).

19938397075 is a wasteful number, since it uses less digits than its factorization.

19938397075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582254 (or 582249 counting only the distinct ones).

The product of its (nonzero) digits is 12859560, while the sum is 61.

The spelling of 19938397075 in words is "nineteen billion, nine hundred thirty-eight million, three hundred ninety-seven thousand, seventy-five".