20198406694 has 8 divisors (see below), whose sum is σ = 30313808928. Its totient is φ = 10093803720.

The previous prime is 20198406677. The next prime is 20198406721. The reversal of 20198406694 is 49660489102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2695137 + ... + 2702620.

It is an arithmetic number, because the mean of its divisors is an integer number (3789226116).

Almost surely, 2^20198406694 is an apocalyptic number.

20198406694 is a deficient number, since it is larger than the sum of its proper divisors (10115402234).

20198406694 is a wasteful number, since it uses less digits than its factorization.

20198406694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5399630.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 20198406694 in words is "twenty billion, one hundred ninety-eight million, four hundred six thousand, six hundred ninety-four".