19875360401 has 16 divisors (see below), whose sum is σ = 21542473680. Its totient is φ = 18228188160.

The previous prime is 19875360389. The next prime is 19875360413. The reversal of 19875360401 is 10406357891.

It is a Cunningham number, because it is equal to 140980²+1.

It is an interprime number because it is at equal distance from previous prime (19875360389) and next prime (19875360413).

It can be written as a sum of positive squares in 8 ways, for example, as 3751440001 + 16123920400 = 61249^2 + 126980^2 .

It is not a de Polignac number, because 19875360401 - 2²² = 19871166097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19875360451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3029741 + ... + 3036293.

It is an arithmetic number, because the mean of its divisors is an integer number (1346404605).

Almost surely, 2^19875360401 is an apocalyptic number.

It is an amenable number.

19875360401 is a deficient number, since it is larger than the sum of its proper divisors (1667113279).

19875360401 is a wasteful number, since it uses less digits than its factorization.

19875360401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8036.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 19875360401 in words is "nineteen billion, eight hundred seventy-five million, three hundred sixty thousand, four hundred one".