19394215045 has 4 divisors (see below), whose sum is σ = 23273058060. Its totient is φ = 15515372032.

The previous prime is 19394214887. The next prime is 19394215069. The reversal of 19394215045 is 54051249391.

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 2618266561 + 16775948484 = 51169^2 + 129522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19394215045 is a prime.

It is a super-2 number, since 2×19394215045² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19394214992 and 19394215010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1939421500 + ... + 1939421509.

It is an arithmetic number, because the mean of its divisors is an integer number (5818264515).

Almost surely, 2^19394215045 is an apocalyptic number.

It is an amenable number.

19394215045 is a deficient number, since it is larger than the sum of its proper divisors (3878843015).

19394215045 is an equidigital number, since it uses as much as digits as its factorization.

19394215045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878843014.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 19394215045 in words is "nineteen billion, three hundred ninety-four million, two hundred fifteen thousand, forty-five".