19940375101 has 4 divisors (see below), whose sum is σ = 19940798304. Its totient is φ = 19939951900.

The previous prime is 19940375087. The next prime is 19940375107. The reversal of 19940375101 is 10157304991.

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 19940375101 - 2⁹ = 19940374589 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19940375107) 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, 130585 + ... + 238606.

It is an arithmetic number, because the mean of its divisors is an integer number (4985199576).

Almost surely, 2^19940375101 is an apocalyptic number.

It is an amenable number.

19940375101 is a deficient number, since it is larger than the sum of its proper divisors (423203).

19940375101 is an equidigital number, since it uses as much as digits as its factorization.

19940375101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423202.

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 19940375101 in words is "nineteen billion, nine hundred forty million, three hundred seventy-five thousand, one hundred one".