19996835098501 has 4 divisors (see below), whose sum is σ = 20004344239392. Its totient is φ = 19989325957612.

The previous prime is 19996835098403. The next prime is 19996835098543. The reversal of 19996835098501 is 10589053869991.

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 a de Polignac number, because none of the positive numbers 2^k-19996835098501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19996835098001) 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, 3754566451 + ... + 3754571776.

It is an arithmetic number, because the mean of its divisors is an integer number (5001086059848).

Almost surely, 2^{19996835098501} is an apocalyptic number.

It is an amenable number.

19996835098501 is a deficient number, since it is larger than the sum of its proper divisors (7509140891).

19996835098501 is an equidigital number, since it uses as much as digits as its factorization.

19996835098501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7509140890.

The product of its (nonzero) digits is 188956800, while the sum is 73.

The spelling of 19996835098501 in words is "nineteen trillion, nine hundred ninety-six billion, eight hundred thirty-five million, ninety-eight thousand, five hundred one".