17920969355 has 4 divisors (see below), whose sum is σ = 21505163232. Its totient is φ = 14336775480.

The previous prime is 17920969331. The next prime is 17920969403. The reversal of 17920969355 is 55396902971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55396902971 = 4723 ⋅11729177.

It is not a de Polignac number, because 17920969355 - 2⁶ = 17920969291 is a prime.

It is a super-2 number, since 2×17920969355² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17920969355.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792096931 + ... + 1792096940.

It is an arithmetic number, because the mean of its divisors is an integer number (5376290808).

Almost surely, 2^17920969355 is an apocalyptic number.

17920969355 is a deficient number, since it is larger than the sum of its proper divisors (3584193877).

17920969355 is an equidigital number, since it uses as much as digits as its factorization.

17920969355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584193876.

The product of its (nonzero) digits is 4592700, while the sum is 56.

The spelling of 17920969355 in words is "seventeen billion, nine hundred twenty million, nine hundred sixty-nine thousand, three hundred fifty-five".