19849248154 has 4 divisors (see below), whose sum is σ = 29773872234. Its totient is φ = 9924624076.

The previous prime is 19849248077. The next prime is 19849248173. The reversal of 19849248154 is 45184294891.

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

It can be written as a sum of positive squares in only one way, i.e., 11755546929 + 8093701225 = 108423^2 + 89965^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19849248095 and 19849248104.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4962312037 + ... + 4962312040.

Almost surely, 2^19849248154 is an apocalyptic number.

19849248154 is a deficient number, since it is larger than the sum of its proper divisors (9924624080).

19849248154 is an equidigital number, since it uses as much as digits as its factorization.

19849248154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9924624079.

The product of its digits is 3317760, while the sum is 55.

The spelling of 19849248154 in words is "nineteen billion, eight hundred forty-nine million, two hundred forty-eight thousand, one hundred fifty-four".