20648405801 has 16 divisors (see below), whose sum is σ = 21180579840. Its totient is φ = 20120339280.

The previous prime is 20648405783. The next prime is 20648405803. The reversal of 20648405801 is 10850484602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20648405801 - 2²⁶ = 20581296937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20648405803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13664636 + ... + 13666146.

It is an arithmetic number, because the mean of its divisors is an integer number (1323786240).

Almost surely, 2^20648405801 is an apocalyptic number.

It is an amenable number.

20648405801 is a deficient number, since it is larger than the sum of its proper divisors (532174039).

20648405801 is a wasteful number, since it uses less digits than its factorization.

20648405801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644.

The product of its (nonzero) digits is 61440, while the sum is 38.

The spelling of 20648405801 in words is "twenty billion, six hundred forty-eight million, four hundred five thousand, eight hundred one".