19774514213 has 4 divisors (see below), whose sum is σ = 19949510028. Its totient is φ = 19599518400.

The previous prime is 19774514191. The next prime is 19774514269. The reversal of 19774514213 is 31241547791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31241547791 = 19 ⋅1644291989.

It can be written as a sum of positive squares in 2 ways, for example, as 8100360004 + 11674154209 = 90002^2 + 108047^2 .

It is a cyclic number.

It is not a de Polignac number, because 19774514213 - 2¹⁶ = 19774448677 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 (19774514273) 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, 87497738 + ... + 87497963.

It is an arithmetic number, because the mean of its divisors is an integer number (4987377507).

Almost surely, 2^19774514213 is an apocalyptic number.

It is an amenable number.

19774514213 is a deficient number, since it is larger than the sum of its proper divisors (174995815).

19774514213 is a wasteful number, since it uses less digits than its factorization.

19774514213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174995814.

The product of its digits is 211680, while the sum is 44.

The spelling of 19774514213 in words is "nineteen billion, seven hundred seventy-four million, five hundred fourteen thousand, two hundred thirteen".