20493390898 has 8 divisors (see below), whose sum is σ = 31454972208. Its totient is φ = 10008400164.

The previous prime is 20493390893. The next prime is 20493390901. The reversal of 20493390898 is 89809339402.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20493390893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119147536 + ... + 119147707.

It is an arithmetic number, because the mean of its divisors is an integer number (3931871526).

Almost surely, 2^20493390898 is an apocalyptic number.

20493390898 is a deficient number, since it is larger than the sum of its proper divisors (10961581310).

20493390898 is a wasteful number, since it uses less digits than its factorization.

20493390898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238295288.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 20493390898 in words is "twenty billion, four hundred ninety-three million, three hundred ninety thousand, eight hundred ninety-eight".