19214384797 has 4 divisors (see below), whose sum is σ = 19876949820. Its totient is φ = 18551819776.

The previous prime is 19214384773. The next prime is 19214384807. The reversal of 19214384797 is 79748341291.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5084545636 + 14129839161 = 71306^2 + 118869^2 .

It is a cyclic number.

It is not a de Polignac number, because 19214384797 - 2⁷ = 19214384669 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 (19214384597) 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, 331282468 + ... + 331282525.

It is an arithmetic number, because the mean of its divisors is an integer number (4969237455).

Almost surely, 2^19214384797 is an apocalyptic number.

It is an amenable number.

19214384797 is a deficient number, since it is larger than the sum of its proper divisors (662565023).

19214384797 is an equidigital number, since it uses as much as digits as its factorization.

19214384797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662565022.

The product of its digits is 3048192, while the sum is 55.

The spelling of 19214384797 in words is "nineteen billion, two hundred fourteen million, three hundred eighty-four thousand, seven hundred ninety-seven".