20215315241 has 12 divisors (see below), whose sum is σ = 22551792816. Its totient is φ = 18103260120.

The previous prime is 20215315207. The next prime is 20215315261. The reversal of 20215315241 is 14251351202.

It is a de Polignac number, because none of the positive numbers 2^k-20215315241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20215315241.

It is not an unprimeable number, because it can be changed into a prime (20215315261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1238675 + ... + 1254888.

It is an arithmetic number, because the mean of its divisors is an integer number (1879316068).

Almost surely, 2^20215315241 is an apocalyptic number.

It is an amenable number.

20215315241 is a deficient number, since it is larger than the sum of its proper divisors (2336477575).

20215315241 is a wasteful number, since it uses less digits than its factorization.

20215315241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493652 (or 2493641 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 20215315241 its reverse (14251351202), we get a palindrome (34466666443).

The spelling of 20215315241 in words is "twenty billion, two hundred fifteen million, three hundred fifteen thousand, two hundred forty-one".