19629631601 has 4 divisors (see below), whose sum is σ = 19639894692. Its totient is φ = 19619368512.

The previous prime is 19629631597. The next prime is 19629631627. The reversal of 19629631601 is 10613692691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15223858225 + 4405773376 = 123385^2 + 66376^2 .

It is a cyclic number.

It is not a de Polignac number, because 19629631601 - 2² = 19629631597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19629631631) 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, 5128676 + ... + 5132501.

It is an arithmetic number, because the mean of its divisors is an integer number (4909973673).

Almost surely, 2^19629631601 is an apocalyptic number.

It is an amenable number.

19629631601 is a deficient number, since it is larger than the sum of its proper divisors (10263091).

19629631601 is a wasteful number, since it uses less digits than its factorization.

19629631601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10263090.

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 19629631601 in words is "nineteen billion, six hundred twenty-nine million, six hundred thirty-one thousand, six hundred one".