20648904899 has 8 divisors (see below), whose sum is σ = 23600993280. Its totient is φ = 17697377736.

The previous prime is 20648904893. The next prime is 20648904923. The reversal of 20648904899 is 99840984602.

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

It is a cyclic number.

It is not a de Polignac number, because 20648904899 - 2⁴ = 20648904883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20648904893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58259 + ... + 211404.

It is an arithmetic number, because the mean of its divisors is an integer number (2950124160).

Almost surely, 2^20648904899 is an apocalyptic number.

20648904899 is a deficient number, since it is larger than the sum of its proper divisors (2952088381).

20648904899 is a wasteful number, since it uses less digits than its factorization.

20648904899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280609.

The product of its (nonzero) digits is 8957952, while the sum is 59.

The spelling of 20648904899 in words is "twenty billion, six hundred forty-eight million, nine hundred four thousand, eight hundred ninety-nine".