20215040535321 has 32 divisors (see below), whose sum is σ = 28930948899840. Its totient is φ = 12516255071424.

The previous prime is 20215040535271. The next prime is 20215040535329. The reversal of 20215040535321 is 12353504051202.

It is not a de Polignac number, because 20215040535321 - 2⁹ = 20215040534809 is a prime.

It is a super-2 number, since 2×20215040535321² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20215040535329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 958990 + ... + 6430376.

It is an arithmetic number, because the mean of its divisors is an integer number (904092153120).

Almost surely, 2^{20215040535321} is an apocalyptic number.

It is an amenable number.

20215040535321 is a deficient number, since it is larger than the sum of its proper divisors (8715908364519).

20215040535321 is a wasteful number, since it uses less digits than its factorization.

20215040535321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5472685.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 20215040535321 its reverse (12353504051202), we get a palindrome (32568544586523).

The spelling of 20215040535321 in words is "twenty trillion, two hundred fifteen billion, forty million, five hundred thirty-five thousand, three hundred twenty-one".