19357418361913 has 4 divisors (see below), whose sum is σ = 19464365424868. Its totient is φ = 19250471298960.

The previous prime is 19357418361907. The next prime is 19357418361973. The reversal of 19357418361913 is 31916381475391.

It is a happy number.

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 4313546840464 + 15043871521449 = 2076908^2 + 3878643^2 .

It is a cyclic number.

It is not a de Polignac number, because 19357418361913 - 2²¹ = 19357416264761 is a prime.

It is a super-3 number, since 3×19357418361913³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19357418361973) by changing a digit.

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, 53473531206 + ... + 53473531567.

It is an arithmetic number, because the mean of its divisors is an integer number (4866091356217).

Almost surely, 2^{19357418361913} is an apocalyptic number.

It is an amenable number.

19357418361913 is a deficient number, since it is larger than the sum of its proper divisors (106947062955).

19357418361913 is a wasteful number, since it uses less digits than its factorization.

19357418361913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106947062954.

The product of its digits is 14696640, while the sum is 61.

The spelling of 19357418361913 in words is "nineteen trillion, three hundred fifty-seven billion, four hundred eighteen million, three hundred sixty-one thousand, nine hundred thirteen".