17941434779 has 4 divisors (see below), whose sum is σ = 18885720840. Its totient is φ = 16997148720.

The previous prime is 17941434743. The next prime is 17941434787. The reversal of 17941434779 is 97743414971.

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: 97743414971 = 41 ⋅2383985731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17941434779 is a prime.

It is a super-2 number, since 2×17941434779² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17941434179) 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, 472143002 + ... + 472143039.

It is an arithmetic number, because the mean of its divisors is an integer number (4721430210).

Almost surely, 2^17941434779 is an apocalyptic number.

17941434779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

17941434779 is a deficient number, since it is larger than the sum of its proper divisors (944286061).

17941434779 is an equidigital number, since it uses as much as digits as its factorization.

17941434779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944286060.

The product of its digits is 5334336, while the sum is 56.

The spelling of 17941434779 in words is "seventeen billion, nine hundred forty-one million, four hundred thirty-four thousand, seven hundred seventy-nine".