19794895653 has 32 divisors (see below), whose sum is σ = 29133603072. Its totient is φ = 11877465600.

The previous prime is 19794895649. The next prime is 19794895663. The reversal of 19794895653 is 35659849791.

It is not a de Polignac number, because 19794895653 - 2² = 19794895649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19794895643) 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, 4572576 + ... + 4576902.

It is an arithmetic number, because the mean of its divisors is an integer number (910425096).

Almost surely, 2^19794895653 is an apocalyptic number.

19794895653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19794895653 is a deficient number, since it is larger than the sum of its proper divisors (9338707419).

19794895653 is a wasteful number, since it uses less digits than its factorization.

19794895653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7245.

The product of its digits is 73483200, while the sum is 66.

The spelling of 19794895653 in words is "nineteen billion, seven hundred ninety-four million, eight hundred ninety-five thousand, six hundred fifty-three".