19210020210023 has 4 divisors (see below), whose sum is σ = 20045238480048. Its totient is φ = 18374801940000.

The previous prime is 19210020209983. The next prime is 19210020210037. The reversal of 19210020210023 is 32001202001291.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 19210020210023 - 2¹⁸ = 19210019947879 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 835218270001 = 19210020210023 / (1 + 9 + 2 + 1 + 0 + 0 + 2 + 0 + 2 + 1 + 0 + 0 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19210020210223) 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, 417609134978 + ... + 417609135023.

It is an arithmetic number, because the mean of its divisors is an integer number (5011309620012).

Almost surely, 2^{19210020210023} is an apocalyptic number.

19210020210023 is a deficient number, since it is larger than the sum of its proper divisors (835218270025).

19210020210023 is an equidigital number, since it uses as much as digits as its factorization.

19210020210023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835218270024.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 19210020210023 in words is "nineteen trillion, two hundred ten billion, twenty million, two hundred ten thousand, twenty-three".