20648404605 has 8 divisors (see below), whose sum is σ = 33037447392. Its totient is φ = 11012482448.

The previous prime is 20648404571. The next prime is 20648404613. The reversal of 20648404605 is 50640484602.

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 20648404605 - 2⁷ = 20648404477 is a prime.

It is a super-2 number, since 2×20648404605² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688280139 + ... + 688280168.

It is an arithmetic number, because the mean of its divisors is an integer number (4129680924).

Almost surely, 2^20648404605 is an apocalyptic number.

It is an amenable number.

20648404605 is a deficient number, since it is larger than the sum of its proper divisors (12389042787).

20648404605 is a wasteful number, since it uses less digits than its factorization.

20648404605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376560315.

The product of its (nonzero) digits is 184320, while the sum is 39.

The spelling of 20648404605 in words is "twenty billion, six hundred forty-eight million, four hundred four thousand, six hundred five".