19940375107 has 2 divisors, whose sum is σ = 19940375108. Its totient is φ = 19940375106.

The previous prime is 19940375087. The next prime is 19940375137. The reversal of 19940375107 is 70157304991.

It is a weak prime.

It is an emirp because it is prime and its reverse (70157304991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19940375107 is a prime.

It is a super-2 number, since 2×19940375107² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19940375137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9970187553 + 9970187554.

It is an arithmetic number, because the mean of its divisors is an integer number (9970187554).

Almost surely, 2^19940375107 is an apocalyptic number.

19940375107 is a deficient number, since it is larger than the sum of its proper divisors (1).

19940375107 is an equidigital number, since it uses as much as digits as its factorization.

19940375107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 46.

The spelling of 19940375107 in words is "nineteen billion, nine hundred forty million, three hundred seventy-five thousand, one hundred seven".