19009377479 has 24 divisors (see below), whose sum is σ = 20427598800. Its totient is φ = 17681178240.

The previous prime is 19009377461. The next prime is 19009377493. The reversal of 19009377479 is 97477390091.

It is not a de Polignac number, because 19009377479 - 2⁸ = 19009377223 is a prime.

It is a super-2 number, since 2×19009377479² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19009377419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2868632 + ... + 2875250.

It is an arithmetic number, because the mean of its divisors is an integer number (851149950).

Almost surely, 2^19009377479 is an apocalyptic number.

19009377479 is a deficient number, since it is larger than the sum of its proper divisors (1418221321).

19009377479 is an equidigital number, since it uses as much as digits as its factorization.

19009377479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6815 (or 6792 counting only the distinct ones).

The product of its (nonzero) digits is 3000564, while the sum is 56.

The spelling of 19009377479 in words is "nineteen billion, nine million, three hundred seventy-seven thousand, four hundred seventy-nine".