19928148418 has 4 divisors (see below), whose sum is σ = 29892222630. Its totient is φ = 9964074208.

The previous prime is 19928148403. The next prime is 19928148419. The reversal of 19928148418 is 81484182991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81484182991 = 3529 ⋅23089879.

It can be written as a sum of positive squares in only one way, i.e., 16719265809 + 3208882609 = 129303^2 + 56647^2 .

It is not an unprimeable number, because it can be changed into a prime (19928148419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4982037103 + ... + 4982037106.

Almost surely, 2^19928148418 is an apocalyptic number.

19928148418 is a deficient number, since it is larger than the sum of its proper divisors (9964074212).

19928148418 is an equidigital number, since it uses as much as digits as its factorization.

19928148418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9964074211.

The product of its digits is 1327104, while the sum is 55.

The spelling of 19928148418 in words is "nineteen billion, nine hundred twenty-eight million, one hundred forty-eight thousand, four hundred eighteen".