20631604413 has 32 divisors (see below), whose sum is σ = 33319952640. Its totient is φ = 11085327360.

The previous prime is 20631604393. The next prime is 20631604421. The reversal of 20631604413 is 31440613602.

It is not a de Polignac number, because 20631604413 - 2⁵ = 20631604381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20631604493) 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, 351543 + ... + 406011.

It is an arithmetic number, because the mean of its divisors is an integer number (1041248520).

Almost surely, 2^20631604413 is an apocalyptic number.

It is an amenable number.

20631604413 is a deficient number, since it is larger than the sum of its proper divisors (12688348227).

20631604413 is a wasteful number, since it uses less digits than its factorization.

20631604413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55557.

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 20631604413 in words is "twenty billion, six hundred thirty-one million, six hundred four thousand, four hundred thirteen".