19477294318 has 4 divisors (see below), whose sum is σ = 29215941480. Its totient is φ = 9738647158.

The previous prime is 19477294303. The next prime is 19477294363. The reversal of 19477294318 is 81349277491.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×19477294318³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4869323578 + ... + 4869323581.

It is an arithmetic number, because the mean of its divisors is an integer number (7303985370).

Almost surely, 2^19477294318 is an apocalyptic number.

19477294318 is a deficient number, since it is larger than the sum of its proper divisors (9738647162).

19477294318 is an equidigital number, since it uses as much as digits as its factorization.

19477294318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9738647161.

The product of its digits is 3048192, while the sum is 55.

The spelling of 19477294318 in words is "nineteen billion, four hundred seventy-seven million, two hundred ninety-four thousand, three hundred eighteen".