20650431481 has 32 divisors (see below), whose sum is σ = 22494412800. Its totient is φ = 18901122240.

The previous prime is 20650431463. The next prime is 20650431511. The reversal of 20650431481 is 18413405602.

It is a cyclic number.

It is not a de Polignac number, because 20650431481 - 2⁵ = 20650431449 is a prime.

It is a super-4 number, since 4×20650431481⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20650431401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30502515 + ... + 30503191.

It is an arithmetic number, because the mean of its divisors is an integer number (702950400).

Almost surely, 2^20650431481 is an apocalyptic number.

It is an amenable number.

20650431481 is a deficient number, since it is larger than the sum of its proper divisors (1843981319).

20650431481 is a wasteful number, since it uses less digits than its factorization.

20650431481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 20650431481 in words is "twenty billion, six hundred fifty million, four hundred thirty-one thousand, four hundred eighty-one".