19774087221 has 8 divisors (see below), whose sum is σ = 30131942464. Its totient is φ = 11299478400.

The previous prime is 19774087147. The next prime is 19774087231. The reversal of 19774087221 is 12278047791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19774087221 - 2⁷ = 19774087093 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 (19774087231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470811580 + ... + 470811621.

It is an arithmetic number, because the mean of its divisors is an integer number (3766492808).

Almost surely, 2^19774087221 is an apocalyptic number.

It is an amenable number.

19774087221 is a deficient number, since it is larger than the sum of its proper divisors (10357855243).

19774087221 is an equidigital number, since it uses as much as digits as its factorization.

19774087221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941623211.

The product of its (nonzero) digits is 395136, while the sum is 48.

The spelling of 19774087221 in words is "nineteen billion, seven hundred seventy-four million, eighty-seven thousand, two hundred twenty-one".