19862653797 has 48 divisors (see below), whose sum is σ = 34002691840. Its totient is φ = 10935979776.

The previous prime is 19862653771. The next prime is 19862653799. The reversal of 19862653797 is 79735626891.

19862653797 is a `hidden beast` number, since 1 + 9 + 8 + 6 + 2 + 6 + 537 + 97 = 666.

It is not a de Polignac number, because 19862653797 - 2⁷ = 19862653669 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19862653799) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198729 + ... + 281457.

Almost surely, 2^19862653797 is an apocalyptic number.

It is an amenable number.

19862653797 is a deficient number, since it is larger than the sum of its proper divisors (14140038043).

19862653797 is a wasteful number, since it uses less digits than its factorization.

19862653797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82882 (or 82879 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 19862653797 in words is "nineteen billion, eight hundred sixty-two million, six hundred fifty-three thousand, seven hundred ninety-seven".