19353974653 has 32 divisors (see below), whose sum is σ = 21950595072. Its totient is φ = 16941139200.

The previous prime is 19353974641. The next prime is 19353974669. The reversal of 19353974653 is 35647935391.

It is a cyclic number.

It is not a de Polignac number, because 19353974653 - 2²⁵ = 19320420221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19353974594 and 19353974603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19353974623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7201476 + ... + 7204162.

It is an arithmetic number, because the mean of its divisors is an integer number (685956096).

Almost surely, 2^19353974653 is an apocalyptic number.

19353974653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19353974653 is a deficient number, since it is larger than the sum of its proper divisors (2596620419).

19353974653 is a wasteful number, since it uses less digits than its factorization.

19353974653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085.

The product of its digits is 9185400, while the sum is 55.

The spelling of 19353974653 in words is "nineteen billion, three hundred fifty-three million, nine hundred seventy-four thousand, six hundred fifty-three".