20320355415 has 32 divisors (see below), whose sum is σ = 34167868416. Its totient is φ = 10299381120.

The previous prime is 20320355413. The next prime is 20320355423. The reversal of 20320355415 is 51455302302.

It is not a de Polignac number, because 20320355415 - 2¹ = 20320355413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320355413) 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, 401871 + ... + 449600.

It is an arithmetic number, because the mean of its divisors is an integer number (1067745888).

Almost surely, 2^20320355415 is an apocalyptic number.

20320355415 is a deficient number, since it is larger than the sum of its proper divisors (13847513001).

20320355415 is a wasteful number, since it uses less digits than its factorization.

20320355415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851559.

The product of its (nonzero) digits is 18000, while the sum is 30.

Adding to 20320355415 its reverse (51455302302), we get a palindrome (71775657717).

The spelling of 20320355415 in words is "twenty billion, three hundred twenty million, three hundred fifty-five thousand, four hundred fifteen".