19904698094 has 4 divisors (see below), whose sum is σ = 29857047144. Its totient is φ = 9952349046.

The previous prime is 19904698061. The next prime is 19904698109. The reversal of 19904698094 is 49089640991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49089640991 = 23 ⋅2134332217.

It is a Curzon number.

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, 4976174522 + ... + 4976174525.

It is an arithmetic number, because the mean of its divisors is an integer number (7464261786).

Almost surely, 2^19904698094 is an apocalyptic number.

19904698094 is a deficient number, since it is larger than the sum of its proper divisors (9952349050).

19904698094 is an equidigital number, since it uses as much as digits as its factorization.

19904698094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9952349049.

The product of its (nonzero) digits is 5038848, while the sum is 59.

The spelling of 19904698094 in words is "nineteen billion, nine hundred four million, six hundred ninety-eight thousand, ninety-four".