19374821245 has 16 divisors (see below), whose sum is σ = 25510654512. Its totient is φ = 14037603840.

The previous prime is 19374821243. The next prime is 19374821251. The reversal of 19374821245 is 54212847391.

It can be written as a sum of positive squares in 8 ways, for example, as 653466969 + 18721354276 = 25563^2 + 136826^2 .

It is not a de Polignac number, because 19374821245 - 2¹ = 19374821243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19374821195 and 19374821204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19374821243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2808576 + ... + 2815465.

It is an arithmetic number, because the mean of its divisors is an integer number (1594415907).

Almost surely, 2^19374821245 is an apocalyptic number.

It is an amenable number.

19374821245 is a deficient number, since it is larger than the sum of its proper divisors (6135833267).

19374821245 is a wasteful number, since it uses less digits than its factorization.

19374821245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5624112.

The product of its digits is 483840, while the sum is 46.

The spelling of 19374821245 in words is "nineteen billion, three hundred seventy-four million, eight hundred twenty-one thousand, two hundred forty-five".