19954798 has 4 divisors (see below), whose sum is σ = 29932200. Its totient is φ = 9977398.

The previous prime is 19954789. The next prime is 19954817. The reversal of 19954798 is 89745991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89745991 = 83 ⋅1081277.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4988698 + ... + 4988701.

It is an arithmetic number, because the mean of its divisors is an integer number (7483050).

Almost surely, 2^19954798 is an apocalyptic number.

19954798 is a deficient number, since it is larger than the sum of its proper divisors (9977402).

19954798 is an equidigital number, since it uses as much as digits as its factorization.

19954798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9977401.

The product of its digits is 816480, while the sum is 52.

The square root of 19954798 is about 4467.0793590443. The cubic root of 19954798 is about 271.2371122307.

The spelling of 19954798 in words is "nineteen million, nine hundred fifty-four thousand, seven hundred ninety-eight".