19911210530453 has 16 divisors (see below), whose sum is σ = 21855078375936. Its totient is φ = 17989640717040.

The previous prime is 19911210530417. The next prime is 19911210530483. The reversal of 19911210530453 is 35403501211991.

It is a cyclic number.

It is not a de Polignac number, because 19911210530453 - 2¹⁶ = 19911210464917 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 (19911210530483) 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, 101147000 + ... + 101343662.

It is an arithmetic number, because the mean of its divisors is an integer number (1365942398496).

Almost surely, 2^{19911210530453} is an apocalyptic number.

It is an amenable number.

19911210530453 is a deficient number, since it is larger than the sum of its proper divisors (1943867845483).

19911210530453 is a wasteful number, since it uses less digits than its factorization.

19911210530453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253304.

The product of its (nonzero) digits is 145800, while the sum is 44.

The spelling of 19911210530453 in words is "nineteen trillion, nine hundred eleven billion, two hundred ten million, five hundred thirty thousand, four hundred fifty-three".